57361991 has 8 divisors (see below), whose sum is σ = 57979680. Its totient is φ = 56747808.

The previous prime is 57361987. The next prime is 57362009. The reversal of 57361991 is 19916375.

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 57361991 - 2² = 57361987 is a prime.

It is a super-2 number, since 2×57361991² = 6580796022968162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57361921) 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, 42830 + ... + 44148.

It is an arithmetic number, because the mean of its divisors is an integer number (7247460).

Almost surely, 2^57361991 is an apocalyptic number.

57361991 is a deficient number, since it is larger than the sum of its proper divisors (617689).

57361991 is a wasteful number, since it uses less digits than its factorization.

57361991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753.

The product of its digits is 51030, while the sum is 41.

The square root of 57361991 is about 7573.7699331311. The cubic root of 57361991 is about 385.6630862409.

The spelling of 57361991 in words is "fifty-seven million, three hundred sixty-one thousand, nine hundred ninety-one".