189678425 has 18 divisors (see below), whose sum is σ = 248243598. Its totient is φ = 143749440.

The previous prime is 189678403. The next prime is 189678431. The reversal of 189678425 is 524876981.

189678425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 3055504 + 186622921 = 1748^2 + 13661^2 .

It is not a de Polignac number, because 189678425 - 2¹⁰ = 189677401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1484 + ... + 19533.

It is an arithmetic number, because the mean of its divisors is an integer number (13791311).

Almost surely, 2^189678425 is an apocalyptic number.

It is an amenable number.

189678425 is a deficient number, since it is larger than the sum of its proper divisors (58565173).

189678425 is a wasteful number, since it uses less digits than its factorization.

189678425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21065 (or 21041 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 189678425 is about 13772.3790610047. The cubic root of 189678425 is about 574.5651911338.

The spelling of 189678425 in words is "one hundred eighty-nine million, six hundred seventy-eight thousand, four hundred twenty-five".