85018613 has 2 divisors, whose sum is σ = 85018614. Its totient is φ = 85018612.

The previous prime is 85018589. The next prime is 85018621. The reversal of 85018613 is 31681058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84971524 + 47089 = 9218^2 + 217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85018613 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85018613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85018663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42509306 + 42509307.

It is an arithmetic number, because the mean of its divisors is an integer number (42509307).

Almost surely, 2^85018613 is an apocalyptic number.

It is an amenable number.

85018613 is a deficient number, since it is larger than the sum of its proper divisors (1).

85018613 is an equidigital number, since it uses as much as digits as its factorization.

85018613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 85018613 is about 9220.5538336913. The cubic root of 85018613 is about 439.7150582816.

The spelling of 85018613 in words is "eighty-five million, eighteen thousand, six hundred thirteen".