764381 has 2 divisors, whose sum is σ = 764382. Its totient is φ = 764380.

The previous prime is 764369. The next prime is 764399. The reversal of 764381 is 183467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538756 + 225625 = 734^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 764381 - 2⁶ = 764317 is a prime.

It is a super-2 number, since 2×764381² = 1168556626322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (764321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 382190 + 382191.

It is an arithmetic number, because the mean of its divisors is an integer number (382191).

2⁷⁶⁴³⁸¹ is an apocalyptic number.

It is an amenable number.

764381 is a deficient number, since it is larger than the sum of its proper divisors (1).

764381 is an equidigital number, since it uses as much as digits as its factorization.

764381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 764381 is about 874.2888538692. The cubic root of 764381 is about 91.4330683940.

The spelling of 764381 in words is "seven hundred sixty-four thousand, three hundred eighty-one".