79506881 has 2 divisors, whose sum is σ = 79506882. Its totient is φ = 79506880.

The previous prime is 79506877. The next prime is 79506899. The reversal of 79506881 is 18860597.

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., 74666881 + 4840000 = 8641^2 + 2200^2 .

It is a cyclic number.

It is not a de Polignac number, because 79506881 - 2² = 79506877 is a prime.

It is a super-2 number, since 2×79506881² = 12642688252696322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79506481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39753440 + 39753441.

It is an arithmetic number, because the mean of its divisors is an integer number (39753441).

Almost surely, 2^79506881 is an apocalyptic number.

It is an amenable number.

79506881 is a deficient number, since it is larger than the sum of its proper divisors (1).

79506881 is an equidigital number, since it uses as much as digits as its factorization.

79506881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 79506881 is about 8916.6631090336. The cubic root of 79506881 is about 429.9997854695. Note that the first 3 decimals are identical.

The spelling of 79506881 in words is "seventy-nine million, five hundred six thousand, eight hundred eighty-one".