85686407 has 4 divisors (see below), whose sum is σ = 85786560. Its totient is φ = 85586256.

The previous prime is 85686397. The next prime is 85686427. The reversal of 85686407 is 70468658.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85686407 - 2⁶ = 85686343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85686427) 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, 48782 + ... + 50507.

It is an arithmetic number, because the mean of its divisors is an integer number (21446640).

Almost surely, 2^85686407 is an apocalyptic number.

85686407 is a deficient number, since it is larger than the sum of its proper divisors (100153).

85686407 is an equidigital number, since it uses as much as digits as its factorization.

85686407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100152.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 85686407 is about 9256.6952526266. The cubic root of 85686407 is about 440.8633307640.

The spelling of 85686407 in words is "eighty-five million, six hundred eighty-six thousand, four hundred seven".