57121679 has 8 divisors (see below), whose sum is σ = 58275840. Its totient is φ = 55978776.

The previous prime is 57121667. The next prime is 57121693. The reversal of 57121679 is 97612175.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57121679 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 (57121079) 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, 7832 + ... + 13250.

It is an arithmetic number, because the mean of its divisors is an integer number (7284480).

Almost surely, 2^57121679 is an apocalyptic number.

57121679 is a deficient number, since it is larger than the sum of its proper divisors (1154161).

57121679 is a wasteful number, since it uses less digits than its factorization.

57121679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5629.

The product of its digits is 26460, while the sum is 38.

The square root of 57121679 is about 7557.8885278893. Note that the first 3 decimals coincide. The cubic root of 57121679 is about 385.1237674827.

The spelling of 57121679 in words is "fifty-seven million, one hundred twenty-one thousand, six hundred seventy-nine".