57781373 has 8 divisors (see below), whose sum is σ = 62323800. Its totient is φ = 53252928.

The previous prime is 57781331. The next prime is 57781417. The reversal of 57781373 is 37318775.

It can be written as a sum of positive squares in 4 ways, for example, as 597529 + 57183844 = 773^2 + 7562^2 .

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 57781373 - 2²⁴ = 41004157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 57781373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57781573) 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, 6083 + ... + 12351.

It is an arithmetic number, because the mean of its divisors is an integer number (7790475).

Almost surely, 2^57781373 is an apocalyptic number.

It is an amenable number.

57781373 is a deficient number, since it is larger than the sum of its proper divisors (4542427).

57781373 is a wasteful number, since it uses less digits than its factorization.

57781373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6991.

The product of its digits is 123480, while the sum is 41.

The square root of 57781373 is about 7601.4059883682. The cubic root of 57781373 is about 386.6006849198.

The spelling of 57781373 in words is "fifty-seven million, seven hundred eighty-one thousand, three hundred seventy-three".