85760639 has 4 divisors (see below), whose sum is σ = 85940160. Its totient is φ = 85581120.

The previous prime is 85760617. The next prime is 85760651. The reversal of 85760639 is 93606758.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85760639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85760639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85760659) 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, 89042 + ... + 89999.

It is an arithmetic number, because the mean of its divisors is an integer number (21485040).

Almost surely, 2^85760639 is an apocalyptic number.

85760639 is a deficient number, since it is larger than the sum of its proper divisors (179521).

85760639 is a wasteful number, since it uses less digits than its factorization.

85760639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179520.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 85760639 is about 9260.7040229132. The cubic root of 85760639 is about 440.9906038520.

The spelling of 85760639 in words is "eighty-five million, seven hundred sixty thousand, six hundred thirty-nine".