85159913 has 2 divisors, whose sum is σ = 85159914. Its totient is φ = 85159912.

The previous prime is 85159891. The next prime is 85159927. The reversal of 85159913 is 31995158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62853184 + 22306729 = 7928^2 + 4723^2 .

It is a cyclic number.

It is not a de Polignac number, because 85159913 - 2⁶ = 85159849 is a prime.

It is not a weakly prime, because it can be changed into another prime (85159933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42579956 + 42579957.

It is an arithmetic number, because the mean of its divisors is an integer number (42579957).

Almost surely, 2^85159913 is an apocalyptic number.

It is an amenable number.

85159913 is a deficient number, since it is larger than the sum of its proper divisors (1).

85159913 is an equidigital number, since it uses as much as digits as its factorization.

85159913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48600, while the sum is 41.

The square root of 85159913 is about 9228.2128822432. The cubic root of 85159913 is about 439.9585239830.

The spelling of 85159913 in words is "eighty-five million, one hundred fifty-nine thousand, nine hundred thirteen".