199577379 has 16 divisors (see below), whose sum is σ = 270998784. Its totient is φ = 130620000.

The previous prime is 199577377. The next prime is 199577407. The reversal of 199577379 is 973775991.

It is not a de Polignac number, because 199577379 - 2¹ = 199577377 is a prime.

It is a super-2 number, since 2×199577379² = 79662260417019282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199577377) 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, 51597 + ... + 55329.

It is an arithmetic number, because the mean of its divisors is an integer number (16937424).

Almost surely, 2^199577379 is an apocalyptic number.

199577379 is a deficient number, since it is larger than the sum of its proper divisors (71421405).

199577379 is a wasteful number, since it uses less digits than its factorization.

199577379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4058.

The product of its digits is 3750705, while the sum is 57.

The square root of 199577379 is about 14127.1858131760. The cubic root of 199577379 is about 584.3913400599.

The spelling of 199577379 in words is "one hundred ninety-nine million, five hundred seventy-seven thousand, three hundred seventy-nine".