189312825 has 24 divisors (see below), whose sum is σ = 337075648. Its totient is φ = 93199680.

The previous prime is 189312821. The next prime is 189312889. The reversal of 189312825 is 528213981.

It is not a de Polignac number, because 189312825 - 2² = 189312821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189312821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96109 + ... + 98058.

Almost surely, 2^189312825 is an apocalyptic number.

189312825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189312825 is a deficient number, since it is larger than the sum of its proper divisors (147762823).

189312825 is a wasteful number, since it uses less digits than its factorization.

189312825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194193 (or 194188 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 189312825 is about 13759.0997161878. The cubic root of 189312825 is about 574.1958007812.

The spelling of 189312825 in words is "one hundred eighty-nine million, three hundred twelve thousand, eight hundred twenty-five".