199787964 has 24 divisors (see below), whose sum is σ = 490707840. Its totient is φ = 63090864.

The previous prime is 199787941. The next prime is 199787971. The reversal of 199787964 is 469787991.

It is a junction number, because it is equal to n+sod(n) for n = 199787898 and 199787907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437904 + ... + 438359.

It is an arithmetic number, because the mean of its divisors is an integer number (20446160).

Almost surely, 2^199787964 is an apocalyptic number.

It is an amenable number.

199787964 is an abundant number, since it is smaller than the sum of its proper divisors (290919876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199787964 is a wasteful number, since it uses less digits than its factorization.

199787964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876289 (or 876287 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 60.

The square root of 199787964 is about 14134.6370310666. The cubic root of 199787964 is about 584.5968088902.

The spelling of 199787964 in words is "one hundred ninety-nine million, seven hundred eighty-seven thousand, nine hundred sixty-four".