199970001 has 48 divisors (see below), whose sum is σ = 363811968. Its totient is φ = 102816000.

The previous prime is 199969967. The next prime is 199970011. The reversal of 199970001 is 100079991.

199970001 is a nontrivial binomial coefficient, being equal to C(19999, 2).

It is not a de Polignac number, because 199970001 - 2⁷ = 199969873 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (199970011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68565 + ... + 71421.

It is an arithmetic number, because the mean of its divisors is an integer number (7579416).

Almost surely, 2^199970001 is an apocalyptic number.

199970001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

199970001 is the 19998-th triangular number.

It is an amenable number.

199970001 is a deficient number, since it is larger than the sum of its proper divisors (163841967).

199970001 is a wasteful number, since it uses less digits than its factorization.

199970001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982 (or 2979 counting only the distinct ones).

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

The square root of 199970001 is about 14141.0749591394. The cubic root of 199970001 is about 584.7743069778.

The spelling of 199970001 in words is "one hundred ninety-nine million, nine hundred seventy thousand, one".