199157913 has 8 divisors (see below), whose sum is σ = 295048800. Its totient is φ = 132771924.

The previous prime is 199157909. The next prime is 199157929. The reversal of 199157913 is 319751991.

It is a happy number.

It is not a de Polignac number, because 199157913 - 2² = 199157909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199157953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3688083 + ... + 3688136.

It is an arithmetic number, because the mean of its divisors is an integer number (36881100).

Almost surely, 2^199157913 is an apocalyptic number.

It is an amenable number.

199157913 is a deficient number, since it is larger than the sum of its proper divisors (95890887).

199157913 is an equidigital number, since it uses as much as digits as its factorization.

199157913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7376228 (or 7376222 counting only the distinct ones).

The product of its digits is 76545, while the sum is 45.

The square root of 199157913 is about 14112.3319476265. The cubic root of 199157913 is about 583.9816339145.

The spelling of 199157913 in words is "one hundred ninety-nine million, one hundred fifty-seven thousand, nine hundred thirteen".