79846381 has 2 divisors, whose sum is σ = 79846382. Its totient is φ = 79846380.

The previous prime is 79846369. The next prime is 79846397. The reversal of 79846381 is 18364897.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79370281 + 476100 = 8909^2 + 690^2 .

It is an emirp because it is prime and its reverse (18364897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79846381 - 2¹¹ = 79844333 is a prime.

It is a super-2 number, since 2×79846381² = 12750889117594322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79846181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39923190 + 39923191.

It is an arithmetic number, because the mean of its divisors is an integer number (39923191).

Almost surely, 2^79846381 is an apocalyptic number.

It is an amenable number.

79846381 is a deficient number, since it is larger than the sum of its proper divisors (1).

79846381 is an equidigital number, since it uses as much as digits as its factorization.

79846381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 79846381 is about 8935.6802203302. The cubic root of 79846381 is about 430.6109595306.

It can be divided in two parts, 7984 and 6381, that added together give a triangular number (14365 = T₁₆₉).

The spelling of 79846381 in words is "seventy-nine million, eight hundred forty-six thousand, three hundred eighty-one".