199975641 has 16 divisors (see below), whose sum is σ = 282610944. Its totient is φ = 125345024.

The previous prime is 199975631. The next prime is 199975661. The reversal of 199975641 is 146579991.

It is a cyclic number.

It is not a de Polignac number, because 199975641 - 2⁵ = 199975609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (199975621) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 79495 + ... + 81971.

It is an arithmetic number, because the mean of its divisors is an integer number (17663184).

Almost surely, 2^199975641 is an apocalyptic number.

It is an amenable number.

199975641 is a deficient number, since it is larger than the sum of its proper divisors (82635303).

199975641 is a wasteful number, since it uses less digits than its factorization.

199975641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4080.

The product of its digits is 612360, while the sum is 51.

The square root of 199975641 is about 14141.2743768021. The cubic root of 199975641 is about 584.7798046293.

The spelling of 199975641 in words is "one hundred ninety-nine million, nine hundred seventy-five thousand, six hundred forty-one".