57426779 has 4 divisors (see below), whose sum is σ = 57515376. Its totient is φ = 57338184.

The previous prime is 57426763. The next prime is 57426781. The reversal of 57426779 is 97762475.

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

It is a cyclic number.

It is not a de Polignac number, because 57426779 - 2⁴ = 57426763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57426739) 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, 43319 + ... + 44624.

It is an arithmetic number, because the mean of its divisors is an integer number (14378844).

Almost surely, 2^57426779 is an apocalyptic number.

57426779 is a deficient number, since it is larger than the sum of its proper divisors (88597).

57426779 is an equidigital number, since it uses as much as digits as its factorization.

57426779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88596.

The product of its digits is 740880, while the sum is 47.

The square root of 57426779 is about 7578.0458562878. The cubic root of 57426779 is about 385.8082284537.

It can be divided in two parts, 5742 and 6779, that added together give a palindrome (12521).

The spelling of 57426779 in words is "fifty-seven million, four hundred twenty-six thousand, seven hundred seventy-nine".