199025685 has 24 divisors (see below), whose sum is σ = 353395224. Its totient is φ = 103557120.

The previous prime is 199025677. The next prime is 199025719. The reversal of 199025685 is 586520991.

It can be written as a sum of positive squares in 4 ways, for example, as 27468081 + 171557604 = 5241^2 + 13098^2 .

It is not a de Polignac number, because 199025685 - 2³ = 199025677 is a prime.

It is a super-2 number, since 2×199025685² = 79222446579438450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 199025685.

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, 52092 + ... + 55781.

It is an arithmetic number, because the mean of its divisors is an integer number (14724801).

Almost surely, 2^199025685 is an apocalyptic number.

199025685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199025685 is a deficient number, since it is larger than the sum of its proper divisors (154369539).

199025685 is a wasteful number, since it uses less digits than its factorization.

199025685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107925 (or 107922 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 199025685 is about 14107.6463309795. The cubic root of 199025685 is about 583.8523632635.

The spelling of 199025685 in words is "one hundred ninety-nine million, twenty-five thousand, six hundred eighty-five".