199725057 has 24 divisors (see below), whose sum is σ = 334632896. Its totient is φ = 112422816.

The previous prime is 199725013. The next prime is 199725073. The reversal of 199725057 is 750527991.

It is a de Polignac number, because none of the positive numbers 2^k-199725057 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199725257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19438 + ... + 27879.

Almost surely, 2^199725057 is an apocalyptic number.

It is an amenable number.

199725057 is a deficient number, since it is larger than the sum of its proper divisors (134907839).

199725057 is a wasteful number, since it uses less digits than its factorization.

199725057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47397 (or 47394 counting only the distinct ones).

The product of its (nonzero) digits is 198450, while the sum is 45.

The square root of 199725057 is about 14132.4115776466. The cubic root of 199725057 is about 584.5354453473.

The spelling of 199725057 in words is "one hundred ninety-nine million, seven hundred twenty-five thousand, fifty-seven".