57477997 has 4 divisors (see below), whose sum is σ = 57618940. Its totient is φ = 57337056.

The previous prime is 57477967. The next prime is 57478007. The reversal of 57477997 is 79977475.

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 24000201 + 33477796 = 4899^2 + 5786^2 .

It is a cyclic number.

It is not a de Polignac number, because 57477997 - 2¹⁵ = 57445229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57477947) 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, 69858 + ... + 70675.

It is an arithmetic number, because the mean of its divisors is an integer number (14404735).

Almost surely, 2^57477997 is an apocalyptic number.

It is an amenable number.

57477997 is a deficient number, since it is larger than the sum of its proper divisors (140943).

57477997 is a wasteful number, since it uses less digits than its factorization.

57477997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140942.

The product of its digits is 3889620, while the sum is 55.

The square root of 57477997 is about 7581.4244703749. The cubic root of 57477997 is about 385.9228930432.

The spelling of 57477997 in words is "fifty-seven million, four hundred seventy-seven thousand, nine hundred ninety-seven".