85122013 has 2 divisors, whose sum is σ = 85122014. Its totient is φ = 85122012.

The previous prime is 85121969. The next prime is 85122017. The reversal of 85122013 is 31022158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85045284 + 76729 = 9222^2 + 277^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85122013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85122017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42561006 + 42561007.

It is an arithmetic number, because the mean of its divisors is an integer number (42561007).

Almost surely, 2^85122013 is an apocalyptic number.

It is an amenable number.

85122013 is a deficient number, since it is larger than the sum of its proper divisors (1).

85122013 is an equidigital number, since it uses as much as digits as its factorization.

85122013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 85122013 is about 9226.1591683647. The cubic root of 85122013 is about 439.8932471733.

The spelling of 85122013 in words is "eighty-five million, one hundred twenty-two thousand, thirteen".