79860961 has 2 divisors, whose sum is σ = 79860962. Its totient is φ = 79860960.

The previous prime is 79860941. The next prime is 79860967. The reversal of 79860961 is 16906897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59213025 + 20647936 = 7695^2 + 4544^2 .

It is a cyclic number.

It is not a de Polignac number, because 79860961 - 2¹³ = 79852769 is a prime.

It is not a weakly prime, because it can be changed into another prime (79860967) 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, 39930480 + 39930481.

It is an arithmetic number, because the mean of its divisors is an integer number (39930481).

Almost surely, 2^79860961 is an apocalyptic number.

It is an amenable number.

79860961 is a deficient number, since it is larger than the sum of its proper divisors (1).

79860961 is an equidigital number, since it uses as much as digits as its factorization.

79860961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 79860961 is about 8936.4960135391. The cubic root of 79860961 is about 430.6371678806.

The spelling of 79860961 in words is "seventy-nine million, eight hundred sixty thousand, nine hundred sixty-one".