199902970 has 8 divisors (see below), whose sum is σ = 359825364. Its totient is φ = 79961184.

The previous prime is 199902931. The next prime is 199902977. The reversal of 199902970 is 79209991.

It can be written as a sum of positive squares in 2 ways, for example, as 186131449 + 13771521 = 13643^2 + 3711^2 .

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

It is a super-2 number, since 2×199902970² = 79922394829641800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 199902970.

It is not an unprimeable number, because it can be changed into a prime (199902977) 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 3 ways as a sum of consecutive naturals, for example, 9995139 + ... + 9995158.

Almost surely, 2^199902970 is an apocalyptic number.

199902970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199902970 is a deficient number, since it is larger than the sum of its proper divisors (159922394).

199902970 is a wasteful number, since it uses less digits than its factorization.

199902970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19990304.

The product of its (nonzero) digits is 91854, while the sum is 46.

The square root of 199902970 is about 14138.7046790008. The cubic root of 199902970 is about 584.7089598641.

The spelling of 199902970 in words is "one hundred ninety-nine million, nine hundred two thousand, nine hundred seventy".