199492857 has 12 divisors (see below), whose sum is σ = 288675504. Its totient is φ = 132755640.

The previous prime is 199492847. The next prime is 199492861. The reversal of 199492857 is 758294991.

199492857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199492857 - 2⁶ = 199492793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199492817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14619 + ... + 24752.

It is an arithmetic number, because the mean of its divisors is an integer number (24056292).

Almost surely, 2^199492857 is an apocalyptic number.

It is an amenable number.

199492857 is a deficient number, since it is larger than the sum of its proper divisors (89182647).

199492857 is a wasteful number, since it uses less digits than its factorization.

199492857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39940 (or 39937 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 199492857 is about 14124.1940301031. The cubic root of 199492857 is about 584.3088308771.

The spelling of 199492857 in words is "one hundred ninety-nine million, four hundred ninety-two thousand, eight hundred fifty-seven".