199032457 has 8 divisors (see below), whose sum is σ = 216553736. Its totient is φ = 181827072.

The previous prime is 199032443. The next prime is 199032469. The reversal of 199032457 is 754230991.

It can be written as a sum of positive squares in 4 ways, for example, as 35473936 + 163558521 = 5956^2 + 12789^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199032457 is a prime.

It is a super-2 number, since 2×199032457² = 79227837878913698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199032497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77658 + ... + 80179.

It is an arithmetic number, because the mean of its divisors is an integer number (27069217).

Almost surely, 2^199032457 is an apocalyptic number.

It is an amenable number.

199032457 is a deficient number, since it is larger than the sum of its proper divisors (17521279).

199032457 is a wasteful number, since it uses less digits than its factorization.

199032457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157947.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 199032457 is about 14107.8863406252. The cubic root of 199032457 is about 583.8589851950.

The spelling of 199032457 in words is "one hundred ninety-nine million, thirty-two thousand, four hundred fifty-seven".