192990825 has 18 divisors (see below), whose sum is σ = 345668414. Its totient is φ = 102928320.

The previous prime is 192990823. The next prime is 192990869. The reversal of 192990825 is 528099291.

It can be written as a sum of positive squares in 3 ways, for example, as 1140624 + 191850201 = 1068^2 + 13851^2 .

It is not a de Polignac number, because 192990825 - 2¹ = 192990823 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (192990821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 428644 + ... + 429093.

Almost surely, 2^192990825 is an apocalyptic number.

192990825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

192990825 is a deficient number, since it is larger than the sum of its proper divisors (152677589).

192990825 is a wasteful number, since it uses less digits than its factorization.

192990825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857753 (or 857745 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 192990825 is about 13892.1137700495. The cubic root of 192990825 is about 577.8904988065.

The spelling of 192990825 in words is "one hundred ninety-two million, nine hundred ninety thousand, eight hundred twenty-five".