79932161 has 2 divisors, whose sum is σ = 79932162. Its totient is φ = 79932160.

The previous prime is 79932157. The next prime is 79932169. The reversal of 79932161 is 16123997.

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., 69889600 + 10042561 = 8360^2 + 3169^2 .

It is an emirp because it is prime and its reverse (16123997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79932161 - 2² = 79932157 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (79932169) 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, 39966080 + 39966081.

It is an arithmetic number, because the mean of its divisors is an integer number (39966081).

Almost surely, 2^79932161 is an apocalyptic number.

It is an amenable number.

79932161 is a deficient number, since it is larger than the sum of its proper divisors (1).

79932161 is an equidigital number, since it uses as much as digits as its factorization.

79932161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 38.

The square root of 79932161 is about 8940.4787903110. The cubic root of 79932161 is about 430.7651079840.

The spelling of 79932161 in words is "seventy-nine million, nine hundred thirty-two thousand, one hundred sixty-one".