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761381 is a prime number
BaseRepresentation
bin10111001111000100101
31102200102022
42321320211
5143331011
624152525
76320525
oct2717045
91380368
10761381
11480045
12308745
1320872a
1415b685
151008db
hexb9e25

761381 has 2 divisors, whose sum is σ = 761382. Its totient is φ = 761380.

The previous prime is 761377. The next prime is 761389. The reversal of 761381 is 183167.

It can be divided in two parts, 761 and 381, that multiplied together give a triangular number (289941 = T761).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 448900 + 312481 = 670^2 + 559^2 .

It is an emirp because it is prime and its reverse (183167) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 761381 - 22 = 761377 is a prime.

It is a super-2 number, since 2×7613812 = 1159402054322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 761381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (761389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380690 + 380691.

It is an arithmetic number, because the mean of its divisors is an integer number (380691).

2761381 is an apocalyptic number.

It is an amenable number.

761381 is a deficient number, since it is larger than the sum of its proper divisors (1).

761381 is an equidigital number, since it uses as much as digits as its factorization.

761381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 761381 is about 872.5714870428. The cubic root of 761381 is about 91.3132944239.

The spelling of 761381 in words is "seven hundred sixty-one thousand, three hundred eighty-one".