85078313 has 2 divisors, whose sum is σ = 85078314. Its totient is φ = 85078312.

The previous prime is 85078297. The next prime is 85078327. The reversal of 85078313 is 31387058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83850649 + 1227664 = 9157^2 + 1108^2 .

It is a cyclic number.

It is not a de Polignac number, because 85078313 - 2⁴ = 85078297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (85078363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42539156 + 42539157.

It is an arithmetic number, because the mean of its divisors is an integer number (42539157).

Almost surely, 2^85078313 is an apocalyptic number.

It is an amenable number.

85078313 is a deficient number, since it is larger than the sum of its proper divisors (1).

85078313 is an equidigital number, since it uses as much as digits as its factorization.

85078313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 85078313 is about 9223.7905982302. The cubic root of 85078313 is about 439.8179567176.

The spelling of 85078313 in words is "eighty-five million, seventy-eight thousand, three hundred thirteen".