199911725 has 24 divisors (see below), whose sum is σ = 270211872. Its totient is φ = 145828800.

The previous prime is 199911713. The next prime is 199911779. The reversal of 199911725 is 527119991.

It is not a de Polignac number, because 199911725 - 2¹⁴ = 199895341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23270 + ... + 30680.

It is an arithmetic number, because the mean of its divisors is an integer number (11258828).

Almost surely, 2^199911725 is an apocalyptic number.

It is an amenable number.

199911725 is a deficient number, since it is larger than the sum of its proper divisors (70300147).

199911725 is a wasteful number, since it uses less digits than its factorization.

199911725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7517 (or 7512 counting only the distinct ones).

The product of its digits is 51030, while the sum is 44.

The square root of 199911725 is about 14139.0142867174. The cubic root of 199911725 is about 584.7174957590.

The spelling of 199911725 in words is "one hundred ninety-nine million, nine hundred eleven thousand, seven hundred twenty-five".