84256657 has 8 divisors (see below), whose sum is σ = 85265600. Its totient is φ = 83253744.

The previous prime is 84256637. The next prime is 84256691. The reversal of 84256657 is 75665248.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84256657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84256637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30508 + ... + 33154.

It is an arithmetic number, because the mean of its divisors is an integer number (10658200).

Almost surely, 2^84256657 is an apocalyptic number.

It is an amenable number.

84256657 is a deficient number, since it is larger than the sum of its proper divisors (1008943).

84256657 is a wasteful number, since it uses less digits than its factorization.

84256657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3015.

The product of its digits is 403200, while the sum is 43.

The square root of 84256657 is about 9179.1424980768. The cubic root of 84256657 is about 438.3975058049.

The spelling of 84256657 in words is "eighty-four million, two hundred fifty-six thousand, six hundred fifty-seven".