189147931 has 8 divisors (see below), whose sum is σ = 217140224. Its totient is φ = 161398440.

The previous prime is 189147911. The next prime is 189147941. The reversal of 189147931 is 139741981.

189147931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189147931 - 2¹⁵ = 189115163 is a prime.

It is a super-2 number, since 2×189147931² = 71553879603161522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189147911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59025 + ... + 62146.

It is an arithmetic number, because the mean of its divisors is an integer number (27142528).

Almost surely, 2^189147931 is an apocalyptic number.

189147931 is a deficient number, since it is larger than the sum of its proper divisors (27992293).

189147931 is a wasteful number, since it uses less digits than its factorization.

189147931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121401.

The product of its digits is 54432, while the sum is 43.

The square root of 189147931 is about 13753.1062309574. The cubic root of 189147931 is about 574.0290416172.

The spelling of 189147931 in words is "one hundred eighty-nine million, one hundred forty-seven thousand, nine hundred thirty-one".