57420723 has 4 divisors (see below), whose sum is σ = 76560968. Its totient is φ = 38280480.

The previous prime is 57420689. The next prime is 57420731. The reversal of 57420723 is 32702475.

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

It is not a de Polignac number, because 57420723 - 2⁶ = 57420659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57420733) 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, 9570118 + ... + 9570123.

It is an arithmetic number, because the mean of its divisors is an integer number (19140242).

Almost surely, 2^57420723 is an apocalyptic number.

57420723 is a deficient number, since it is larger than the sum of its proper divisors (19140245).

57420723 is a wasteful number, since it uses less digits than its factorization.

57420723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19140244.

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 57420723 is about 7577.6462704457. The cubic root of 57420723 is about 385.7946660425.

The spelling of 57420723 in words is "fifty-seven million, four hundred twenty thousand, seven hundred twenty-three".