85015993 has 2 divisors, whose sum is σ = 85015994. Its totient is φ = 85015992.

The previous prime is 85015961. The next prime is 85015999. The reversal of 85015993 is 39951058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82591744 + 2424249 = 9088^2 + 1557^2 .

It is a cyclic number.

It is not a de Polignac number, because 85015993 - 2⁵ = 85015961 is a prime.

It is not a weakly prime, because it can be changed into another prime (85015999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42507996 + 42507997.

It is an arithmetic number, because the mean of its divisors is an integer number (42507997).

Almost surely, 2^85015993 is an apocalyptic number.

It is an amenable number.

85015993 is a deficient number, since it is larger than the sum of its proper divisors (1).

85015993 is an equidigital number, since it uses as much as digits as its factorization.

85015993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 85015993 is about 9220.4117587015. The cubic root of 85015993 is about 439.7105413677.

The spelling of 85015993 in words is "eighty-five million, fifteen thousand, nine hundred ninety-three".