199977394 has 12 divisors (see below), whose sum is σ = 316585854. Its totient is φ = 94725792.

The previous prime is 199977383. The next prime is 199977403. The reversal of 199977394 is 493779991.

It can be written as a sum of positive squares in only one way, i.e., 118526769 + 81450625 = 10887^2 + 9025^2 .

It is a super-2 number, since 2×199977394² = 79981916222062472, which contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 137767 + ... + 139210.

Almost surely, 2^199977394 is an apocalyptic number.

199977394 is a deficient number, since it is larger than the sum of its proper divisors (116608460).

199977394 is a wasteful number, since it uses less digits than its factorization.

199977394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277017 (or 276998 counting only the distinct ones).

The product of its digits is 3857868, while the sum is 58.

The square root of 199977394 is about 14141.3363583503. The cubic root of 199977394 is about 584.7815133640.

The spelling of 199977394 in words is "one hundred ninety-nine million, nine hundred seventy-seven thousand, three hundred ninety-four".