189437247 has 12 divisors (see below), whose sum is σ = 273765960. Its totient is φ = 126229488.

The previous prime is 189437243. The next prime is 189437257. The reversal of 189437247 is 742734981.

It is not a de Polignac number, because 189437247 - 2² = 189437243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189437243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21328 + ... + 28874.

It is an arithmetic number, because the mean of its divisors is an integer number (22813830).

Almost surely, 2^189437247 is an apocalyptic number.

189437247 is a deficient number, since it is larger than the sum of its proper divisors (84328713).

189437247 is a wasteful number, since it uses less digits than its factorization.

189437247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10342 (or 10339 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 189437247 is about 13763.6204176082. The cubic root of 189437247 is about 574.3215660663.

The spelling of 189437247 in words is "one hundred eighty-nine million, four hundred thirty-seven thousand, two hundred forty-seven".