199790001 has 24 divisors (see below), whose sum is σ = 306810504. Its totient is φ = 124846080.

The previous prime is 199789991. The next prime is 199790023. The reversal of 199790001 is 100097991.

It can be written as a sum of positive squares in 4 ways, for example, as 76580001 + 123210000 = 8751^2 + 11100^2 .

It is not a de Polignac number, because 199790001 - 2⁵ = 199789969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199790081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36781 + ... + 41861.

It is an arithmetic number, because the mean of its divisors is an integer number (12783771).

Almost surely, 2^199790001 is an apocalyptic number.

It is an amenable number.

199790001 is a deficient number, since it is larger than the sum of its proper divisors (107020503).

199790001 is a wasteful number, since it uses less digits than its factorization.

199790001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361 (or 5358 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 36.

The square root of 199790001 is about 14134.7090879155. The cubic root of 199790001 is about 584.5987956960.

The spelling of 199790001 in words is "one hundred ninety-nine million, seven hundred ninety thousand, one".