85658613 has 4 divisors (see below), whose sum is σ = 114211488. Its totient is φ = 57105740.

The previous prime is 85658609. The next prime is 85658641. The reversal of 85658613 is 31685658.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85658613 - 2² = 85658609 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85658603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14276433 + ... + 14276438.

It is an arithmetic number, because the mean of its divisors is an integer number (28552872).

Almost surely, 2^85658613 is an apocalyptic number.

It is an amenable number.

85658613 is a deficient number, since it is larger than the sum of its proper divisors (28552875).

85658613 is a wasteful number, since it uses less digits than its factorization.

85658613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28552874.

The product of its digits is 172800, while the sum is 42.

The square root of 85658613 is about 9255.1938391370. The cubic root of 85658613 is about 440.8156581675.

The spelling of 85658613 in words is "eighty-five million, six hundred fifty-eight thousand, six hundred thirteen".