199973690 has 32 divisors (see below), whose sum is σ = 413130240. Its totient is φ = 68269824.

The previous prime is 199973681. The next prime is 199973699. The reversal of 199973690 is 96379991.

It is an interprime number because it is at equal distance from previous prime (199973681) and next prime (199973699).

It is a super-2 number, since 2×199973690² = 79978953384432200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199973699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10754 + ... + 22706.

It is an arithmetic number, because the mean of its divisors is an integer number (12910320).

Almost surely, 2^199973690 is an apocalyptic number.

199973690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199973690 is an abundant number, since it is smaller than the sum of its proper divisors (213156550).

199973690 is a wasteful number, since it uses less digits than its factorization.

199973690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12206.

The product of its (nonzero) digits is 826686, while the sum is 53.

The square root of 199973690 is about 14141.2053941664. The cubic root of 199973690 is about 584.7779028825. Note that the first 3 decimals are identical.

The spelling of 199973690 in words is "one hundred ninety-nine million, nine hundred seventy-three thousand, six hundred ninety".