57106729 has 4 divisors (see below), whose sum is σ = 57125376. Its totient is φ = 57088084.

The previous prime is 57106717. The next prime is 57106733. The reversal of 57106729 is 92760175.

57106729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 57106729 - 2⁷ = 57106601 is a prime.

It is a super-2 number, since 2×57106729² = 6522356994158882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57106129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3529 + ... + 11254.

It is an arithmetic number, because the mean of its divisors is an integer number (14281344).

Almost surely, 2^57106729 is an apocalyptic number.

It is an amenable number.

57106729 is a deficient number, since it is larger than the sum of its proper divisors (18647).

57106729 is a wasteful number, since it uses less digits than its factorization.

57106729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18646.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 57106729 is about 7556.8994303219. The cubic root of 57106729 is about 385.0901660970.

The spelling of 57106729 in words is "fifty-seven million, one hundred six thousand, seven hundred twenty-nine".