85764257 has 4 divisors (see below), whose sum is σ = 85824816. Its totient is φ = 85703700.

The previous prime is 85764247. The next prime is 85764277. The reversal of 85764257 is 75246758.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75246758 = 2 ⋅37623379.

It is a cyclic number.

It is not a de Polignac number, because 85764257 - 2⁸ = 85764001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85764247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28103 + ... + 31004.

It is an arithmetic number, because the mean of its divisors is an integer number (21456204).

Almost surely, 2^85764257 is an apocalyptic number.

It is an amenable number.

85764257 is a deficient number, since it is larger than the sum of its proper divisors (60559).

85764257 is a wasteful number, since it uses less digits than its factorization.

85764257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60558.

The product of its digits is 470400, while the sum is 44.

The square root of 85764257 is about 9260.8993623730. The cubic root of 85764257 is about 440.9968051489.

The spelling of 85764257 in words is "eighty-five million, seven hundred sixty-four thousand, two hundred fifty-seven".