85715869 has 4 divisors (see below), whose sum is σ = 86800960. Its totient is φ = 84630780.

The previous prime is 85715863. The next prime is 85715891. The reversal of 85715869 is 96851758.

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 a de Polignac number, because none of the positive numbers 2^k-85715869 is a prime.

It is a super-2 number, since 2×85715869² = 14694420396850322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85715863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542427 + ... + 542584.

It is an arithmetic number, because the mean of its divisors is an integer number (21700240).

Almost surely, 2^85715869 is an apocalyptic number.

It is an amenable number.

85715869 is a deficient number, since it is larger than the sum of its proper divisors (1085091).

85715869 is a wasteful number, since it uses less digits than its factorization.

85715869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085090.

The product of its digits is 604800, while the sum is 49.

The square root of 85715869 is about 9258.2865045320. The cubic root of 85715869 is about 440.9138530795.

The spelling of 85715869 in words is "eighty-five million, seven hundred fifteen thousand, eight hundred sixty-nine".