199974765 has 16 divisors (see below), whose sum is σ = 333871488. Its totient is φ = 102015936.

The previous prime is 199974739. The next prime is 199974781. The reversal of 199974765 is 567479991.

It is not a de Polignac number, because 199974765 - 2⁶ = 199974701 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289474 + ... + 290163.

It is an arithmetic number, because the mean of its divisors is an integer number (20866968).

Almost surely, 2^199974765 is an apocalyptic number.

199974765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199974765 is a deficient number, since it is larger than the sum of its proper divisors (133896723).

199974765 is a wasteful number, since it uses less digits than its factorization.

199974765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579668.

The product of its digits is 4286520, while the sum is 57.

The square root of 199974765 is about 14141.2434036049. The cubic root of 199974765 is about 584.7789507455.

The spelling of 199974765 in words is "one hundred ninety-nine million, nine hundred seventy-four thousand, seven hundred sixty-five".