189888925 has 6 divisors (see below), whose sum is σ = 235462298. Its totient is φ = 151911120.

The previous prime is 189888911. The next prime is 189888947. The reversal of 189888925 is 529888981.

It can be written as a sum of positive squares in 3 ways, for example, as 57592921 + 132296004 = 7589^2 + 11502^2 .

It is not a de Polignac number, because 189888925 - 2¹¹ = 189886877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189888925.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3797754 + ... + 3797803.

Almost surely, 2^189888925 is an apocalyptic number.

It is an amenable number.

189888925 is a deficient number, since it is larger than the sum of its proper divisors (45573373).

189888925 is an equidigital number, since it uses as much as digits as its factorization.

189888925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7595567 (or 7595562 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 58.

The square root of 189888925 is about 13780.0190493337. The cubic root of 189888925 is about 574.7776582070. Note that the first 3 decimals are identical.

The spelling of 189888925 in words is "one hundred eighty-nine million, eight hundred eighty-eight thousand, nine hundred twenty-five".