85706587 has 4 divisors (see below), whose sum is σ = 90217480. Its totient is φ = 81195696.

The previous prime is 85706573. The next prime is 85706597. The reversal of 85706587 is 78560758.

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 85706587 - 2²³ = 77317979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85706507) 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, 2255418 + ... + 2255455.

It is an arithmetic number, because the mean of its divisors is an integer number (22554370).

Almost surely, 2^85706587 is an apocalyptic number.

85706587 is a deficient number, since it is larger than the sum of its proper divisors (4510893).

85706587 is a wasteful number, since it uses less digits than its factorization.

85706587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510892.

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 85706587 is about 9257.7852102973. The cubic root of 85706587 is about 440.8979372786.

The spelling of 85706587 in words is "eighty-five million, seven hundred six thousand, five hundred eighty-seven".