84718257 has 32 divisors (see below), whose sum is σ = 127303680. Its totient is φ = 49757760.

The previous prime is 84718253. The next prime is 84718307. The reversal of 84718257 is 75281748.

It is not a de Polignac number, because 84718257 - 2² = 84718253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84718253) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95068 + ... + 95954.

It is an arithmetic number, because the mean of its divisors is an integer number (3978240).

Almost surely, 2^84718257 is an apocalyptic number.

It is an amenable number.

84718257 is a deficient number, since it is larger than the sum of its proper divisors (42585423).

84718257 is a wasteful number, since it uses less digits than its factorization.

84718257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013.

The product of its digits is 125440, while the sum is 42.

The square root of 84718257 is about 9204.2521151911. The cubic root of 84718257 is about 439.1966349804.

The spelling of 84718257 in words is "eighty-four million, seven hundred eighteen thousand, two hundred fifty-seven".