199079990 has 8 divisors (see below), whose sum is σ = 358344000. Its totient is φ = 79631992.

The previous prime is 199079939. The next prime is 199080001. The reversal of 199079990 is 99970991.

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

It is a Curzon number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 9953990 + ... + 9954009.

It is an arithmetic number, because the mean of its divisors is an integer number (44793000).

Almost surely, 2^199079990 is an apocalyptic number.

199079990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199079990 is a deficient number, since it is larger than the sum of its proper divisors (159264010).

199079990 is a wasteful number, since it uses less digits than its factorization.

199079990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19908006.

The product of its (nonzero) digits is 413343, while the sum is 53.

The square root of 199079990 is about 14109.5708651964. The cubic root of 199079990 is about 583.9054606301.

The spelling of 199079990 in words is "one hundred ninety-nine million, seventy-nine thousand, nine hundred ninety".