57102949 has 4 divisors (see below), whose sum is σ = 60461964. Its totient is φ = 53743936.

The previous prime is 57102937. The next prime is 57102953. The reversal of 57102949 is 94920175.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38526849 + 18576100 = 6207^2 + 4310^2 .

It is not a de Polignac number, because 57102949 - 2⁷ = 57102821 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 (57102959) 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, 1679482 + ... + 1679515.

It is an arithmetic number, because the mean of its divisors is an integer number (15115491).

Almost surely, 2^57102949 is an apocalyptic number.

It is an amenable number.

57102949 is a deficient number, since it is larger than the sum of its proper divisors (3359015).

57102949 is a wasteful number, since it uses less digits than its factorization.

57102949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359014.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 57102949 is about 7556.6493236090. The cubic root of 57102949 is about 385.0816692995.

The spelling of 57102949 in words is "fifty-seven million, one hundred two thousand, nine hundred forty-nine".