85979713 has 2 divisors, whose sum is σ = 85979714. Its totient is φ = 85979712.

The previous prime is 85979687. The next prime is 85979717. The reversal of 85979713 is 31797958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74770609 + 11209104 = 8647^2 + 3348^2 .

It is a cyclic number.

It is not a de Polignac number, because 85979713 - 2¹³ = 85971521 is a prime.

It is a super-2 number, since 2×85979713² = 14785022095124738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85979717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42989856 + 42989857.

It is an arithmetic number, because the mean of its divisors is an integer number (42989857).

Almost surely, 2^85979713 is an apocalyptic number.

It is an amenable number.

85979713 is a deficient number, since it is larger than the sum of its proper divisors (1).

85979713 is an equidigital number, since it uses as much as digits as its factorization.

85979713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 49.

The square root of 85979713 is about 9272.5246292474. The cubic root of 85979713 is about 441.3657854067.

The spelling of 85979713 in words is "eighty-five million, nine hundred seventy-nine thousand, seven hundred thirteen".