85313639 has 2 divisors, whose sum is σ = 85313640. Its totient is φ = 85313638.

The previous prime is 85313609. The next prime is 85313653. The reversal of 85313639 is 93631358.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85313639 - 2¹⁶ = 85248103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85313609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42656819 + 42656820.

It is an arithmetic number, because the mean of its divisors is an integer number (42656820).

Almost surely, 2^85313639 is an apocalyptic number.

85313639 is a deficient number, since it is larger than the sum of its proper divisors (1).

85313639 is an equidigital number, since it uses as much as digits as its factorization.

85313639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 38.

The square root of 85313639 is about 9236.5382584603. The cubic root of 85313639 is about 440.2230945092.

The spelling of 85313639 in words is "eighty-five million, three hundred thirteen thousand, six hundred thirty-nine".