199157959 has 16 divisors (see below), whose sum is σ = 267402240. Its totient is φ = 143249760.

The previous prime is 199157953. The next prime is 199157999. The reversal of 199157959 is 959751991.

It is a cyclic number.

It is not a de Polignac number, because 199157959 - 2²¹ = 197060807 is a prime.

It is a congruent number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98479 + ... + 100480.

It is an arithmetic number, because the mean of its divisors is an integer number (16712640).

Almost surely, 2^199157959 is an apocalyptic number.

199157959 is a deficient number, since it is larger than the sum of its proper divisors (68244281).

199157959 is a wasteful number, since it uses less digits than its factorization.

199157959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198990.

The product of its digits is 1148175, while the sum is 55.

The square root of 199157959 is about 14112.3335774067. Note that the first 3 decimals coincide. The cubic root of 199157959 is about 583.9816788757.

The spelling of 199157959 in words is "one hundred ninety-nine million, one hundred fifty-seven thousand, nine hundred fifty-nine".