79908161 has 2 divisors, whose sum is σ = 79908162. Its totient is φ = 79908160.

The previous prime is 79908151. The next prime is 79908229. The reversal of 79908161 is 16180997.

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., 47872561 + 32035600 = 6919^2 + 5660^2 .

It is a cyclic number.

It is not a de Polignac number, because 79908161 - 2²² = 75713857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (79908151) 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, 39954080 + 39954081.

It is an arithmetic number, because the mean of its divisors is an integer number (39954081).

Almost surely, 2^79908161 is an apocalyptic number.

It is an amenable number.

79908161 is a deficient number, since it is larger than the sum of its proper divisors (1).

79908161 is an equidigital number, since it uses as much as digits as its factorization.

79908161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 79908161 is about 8939.1364795488. The cubic root of 79908161 is about 430.7219905982.

The spelling of 79908161 in words is "seventy-nine million, nine hundred eight thousand, one hundred sixty-one".