76747257 has 20 divisors (see below), whose sum is σ = 115772800. Its totient is φ = 50662584.

The previous prime is 76747249. The next prime is 76747261. The reversal of 76747257 is 75274767.

It is not a de Polignac number, because 76747257 - 2³ = 76747249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76747207) 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 19 ways as a sum of consecutive naturals, for example, 3744 + ... + 12942.

It is an arithmetic number, because the mean of its divisors is an integer number (5788640).

Almost surely, 2^76747257 is an apocalyptic number.

It is an amenable number.

76747257 is a deficient number, since it is larger than the sum of its proper divisors (39025543).

76747257 is a wasteful number, since it uses less digits than its factorization.

76747257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9314 (or 9305 counting only the distinct ones).

The product of its digits is 576240, while the sum is 45.

The square root of 76747257 is about 8760.5511812899. The cubic root of 76747257 is about 424.9661001796.

The spelling of 76747257 in words is "seventy-six million, seven hundred forty-seven thousand, two hundred fifty-seven".