199457634 has 16 divisors (see below), whose sum is σ = 422381088. Its totient is φ = 62574912.

The previous prime is 199457623. The next prime is 199457653. The reversal of 199457634 is 436754991.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 977632 + ... + 977835.

It is an arithmetic number, because the mean of its divisors is an integer number (26398818).

Almost surely, 2^199457634 is an apocalyptic number.

199457634 is an abundant number, since it is smaller than the sum of its proper divisors (222923454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199457634 is a wasteful number, since it uses less digits than its factorization.

199457634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955489.

The product of its digits is 816480, while the sum is 48.

The square root of 199457634 is about 14122.9470720526. The cubic root of 199457634 is about 584.2744398022.

The spelling of 199457634 in words is "one hundred ninety-nine million, four hundred fifty-seven thousand, six hundred thirty-four".