57392729 has 4 divisors (see below), whose sum is σ = 57579984. Its totient is φ = 57205476.

The previous prime is 57392717. The next prime is 57392761. The reversal of 57392729 is 92729375.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57392729 - 2²⁴ = 40615513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57392729.

It is not an unprimeable number, because it can be changed into a prime (57392329) 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 3 ways as a sum of consecutive naturals, for example, 93167 + ... + 93780.

It is an arithmetic number, because the mean of its divisors is an integer number (14394996).

Almost surely, 2^57392729 is an apocalyptic number.

It is an amenable number.

57392729 is a deficient number, since it is larger than the sum of its proper divisors (187255).

57392729 is a wasteful number, since it uses less digits than its factorization.

57392729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187254.

The product of its digits is 238140, while the sum is 44.

The square root of 57392729 is about 7575.7989017661. The cubic root of 57392729 is about 385.7319610882.

The spelling of 57392729 in words is "fifty-seven million, three hundred ninety-two thousand, seven hundred twenty-nine".