85807387 has 4 divisors (see below), whose sum is σ = 85884520. Its totient is φ = 85730256.

The previous prime is 85807373. The next prime is 85807391. The reversal of 85807387 is 78370858.

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-85807387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85807087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36873 + ... + 39130.

It is an arithmetic number, because the mean of its divisors is an integer number (21471130).

Almost surely, 2^85807387 is an apocalyptic number.

85807387 is a deficient number, since it is larger than the sum of its proper divisors (77133).

85807387 is a wasteful number, since it uses less digits than its factorization.

85807387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77132.

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 85807387 is about 9263.2276772192. The cubic root of 85807387 is about 441.0707170768.

Subtracting from 85807387 its reverse (78370858), we obtain a square (7436529 = 2727²).

The spelling of 85807387 in words is "eighty-five million, eight hundred seven thousand, three hundred eighty-seven".