189149847 has 4 divisors (see below), whose sum is σ = 252199800. Its totient is φ = 126099896.

The previous prime is 189149839. The next prime is 189149867. The reversal of 189149847 is 748941981.

189149847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189149847 - 2³ = 189149839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189149847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189149867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31524972 + ... + 31524977.

It is an arithmetic number, because the mean of its divisors is an integer number (63049950).

Almost surely, 2^189149847 is an apocalyptic number.

189149847 is a deficient number, since it is larger than the sum of its proper divisors (63049953).

189149847 is an equidigital number, since it uses as much as digits as its factorization.

189149847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63049952.

The product of its digits is 580608, while the sum is 51.

The square root of 189149847 is about 13753.1758877722. The cubic root of 189149847 is about 574.0309798461.

The spelling of 189149847 in words is "one hundred eighty-nine million, one hundred forty-nine thousand, eight hundred forty-seven".