199357191 has 12 divisors (see below), whose sum is σ = 314138760. Its totient is φ = 120822480.

The previous prime is 199357141. The next prime is 199357217. The reversal of 199357191 is 191753991.

It is a happy number.

It is not a de Polignac number, because 199357191 - 2¹³ = 199348999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199357121) 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, 1006756 + ... + 1006953.

It is an arithmetic number, because the mean of its divisors is an integer number (26178230).

Almost surely, 2^199357191 is an apocalyptic number.

199357191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

199357191 is a deficient number, since it is larger than the sum of its proper divisors (114781569).

199357191 is a wasteful number, since it uses less digits than its factorization.

199357191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013726 (or 2013723 counting only the distinct ones).

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

The square root of 199357191 is about 14119.3906029970. The cubic root of 199357191 is about 584.1763469053.

The spelling of 199357191 in words is "one hundred ninety-nine million, three hundred fifty-seven thousand, one hundred ninety-one".