79636457 has 2 divisors, whose sum is σ = 79636458. Its totient is φ = 79636456.

The previous prime is 79636441. The next prime is 79636481. The reversal of 79636457 is 75463697.

It is a happy number.

79636457 is nontrivially palindromic in base 2.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42133081 + 37503376 = 6491^2 + 6124^2 .

It is a cyclic number.

It is not a de Polignac number, because 79636457 - 2⁴ = 79636441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79630457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39818228 + 39818229.

It is an arithmetic number, because the mean of its divisors is an integer number (39818229).

Almost surely, 2^79636457 is an apocalyptic number.

It is an amenable number.

79636457 is a deficient number, since it is larger than the sum of its proper divisors (1).

79636457 is an equidigital number, since it uses as much as digits as its factorization.

79636457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 47.

The square root of 79636457 is about 8923.9260978563. The cubic root of 79636457 is about 430.2332554549.

The spelling of 79636457 in words is "seventy-nine million, six hundred thirty-six thousand, four hundred fifty-seven".