57977321 has 4 divisors (see below), whose sum is σ = 59391444. Its totient is φ = 56563200.

The previous prime is 57977281. The next prime is 57977329. The reversal of 57977321 is 12377975.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1125721 + 56851600 = 1061^2 + 7540^2 .

It is a cyclic number.

It is not a de Polignac number, because 57977321 - 2¹⁰ = 57976297 is a prime.

It is a super-2 number, since 2×57977321² = 6722739500674082, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 1414081 = 57977321 / (5 + 7 + 9 + 7 + 7 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57977329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707000 + ... + 707081.

It is an arithmetic number, because the mean of its divisors is an integer number (14847861).

Almost surely, 2^57977321 is an apocalyptic number.

It is an amenable number.

57977321 is a deficient number, since it is larger than the sum of its proper divisors (1414123).

57977321 is a wasteful number, since it uses less digits than its factorization.

57977321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414122.

The product of its digits is 92610, while the sum is 41.

The square root of 57977321 is about 7614.2840109888. The cubic root of 57977321 is about 387.0372048352.

The spelling of 57977321 in words is "fifty-seven million, nine hundred seventy-seven thousand, three hundred twenty-one".