57129099 has 4 divisors (see below), whose sum is σ = 76172136. Its totient is φ = 38086064.

The previous prime is 57129089. The next prime is 57129109. The reversal of 57129099 is 99092175.

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

It is an interprime number because it is at equal distance from previous prime (57129089) and next prime (57129109).

It is a cyclic number.

It is not a de Polignac number, because 57129099 - 2⁸ = 57128843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57129099.

It is not an unprimeable number, because it can be changed into a prime (57129049) 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, 9521514 + ... + 9521519.

It is an arithmetic number, because the mean of its divisors is an integer number (19043034).

Almost surely, 2^57129099 is an apocalyptic number.

57129099 is a deficient number, since it is larger than the sum of its proper divisors (19043037).

57129099 is a wasteful number, since it uses less digits than its factorization.

57129099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19043036.

The product of its (nonzero) digits is 51030, while the sum is 42.

The square root of 57129099 is about 7558.3793897899. The cubic root of 57129099 is about 385.1404423814.

The spelling of 57129099 in words is "fifty-seven million, one hundred twenty-nine thousand, ninety-nine".