199772458 has 8 divisors (see below), whose sum is σ = 299738628. Its totient is φ = 99859584.

The previous prime is 199772437. The next prime is 199772471. The reversal of 199772458 is 854277991.

It can be written as a sum of positive squares in 2 ways, for example, as 170903329 + 28869129 = 13073^2 + 5373^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2041 + ... + 20092.

Almost surely, 2^199772458 is an apocalyptic number.

199772458 is a deficient number, since it is larger than the sum of its proper divisors (99966170).

199772458 is a wasteful number, since it uses less digits than its factorization.

199772458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26648.

The product of its digits is 1270080, while the sum is 52.

The square root of 199772458 is about 14134.0885096988. The cubic root of 199772458 is about 584.5816845346.

The spelling of 199772458 in words is "one hundred ninety-nine million, seven hundred seventy-two thousand, four hundred fifty-eight".