76984257 has 32 divisors (see below), whose sum is σ = 125547520. Its totient is φ = 40979520.

The previous prime is 76984247. The next prime is 76984291. The reversal of 76984257 is 75248967.

It is not a de Polignac number, because 76984257 - 2¹⁰ = 76983233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76984217) 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, 22758 + ... + 25920.

It is an arithmetic number, because the mean of its divisors is an integer number (3923360).

Almost surely, 2^76984257 is an apocalyptic number.

It is an amenable number.

76984257 is a deficient number, since it is larger than the sum of its proper divisors (48563263).

76984257 is a wasteful number, since it uses less digits than its factorization.

76984257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253.

The product of its digits is 846720, while the sum is 48.

The square root of 76984257 is about 8774.0673008588. The cubic root of 76984257 is about 425.4030906940.

The spelling of 76984257 in words is "seventy-six million, nine hundred eighty-four thousand, two hundred fifty-seven".