57631691 has 8 divisors (see below), whose sum is σ = 63579264. Its totient is φ = 51900480.

The previous prime is 57631661. The next prime is 57631703. The reversal of 57631691 is 19613675.

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

It is a cyclic number.

It is not a de Polignac number, because 57631691 - 2⁶ = 57631627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57631621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53531 + ... + 54596.

It is an arithmetic number, because the mean of its divisors is an integer number (7947408).

Almost surely, 2^57631691 is an apocalyptic number.

57631691 is a deficient number, since it is larger than the sum of its proper divisors (5947573).

57631691 is a wasteful number, since it uses less digits than its factorization.

57631691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108181.

The product of its digits is 34020, while the sum is 38.

The square root of 57631691 is about 7591.5539252514. The cubic root of 57631691 is about 386.2665679958.

The spelling of 57631691 in words is "fifty-seven million, six hundred thirty-one thousand, six hundred ninety-one".