147844989 has 12 divisors (see below), whose sum is σ = 222839136. Its totient is φ = 94277832.

The previous prime is 147844979. The next prime is 147844993. The reversal of 147844989 is 989448741.

147844989 is a `hidden beast` number, since 147 + 8 + 4 + 498 + 9 = 666.

It is not a de Polignac number, because 147844989 - 2¹¹ = 147842941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147844979) 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, 356907 + ... + 357320.

It is an arithmetic number, because the mean of its divisors is an integer number (18569928).

Almost surely, 2^147844989 is an apocalyptic number.

It is an amenable number.

147844989 is a deficient number, since it is larger than the sum of its proper divisors (74994147).

147844989 is a wasteful number, since it uses less digits than its factorization.

147844989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714256 (or 714253 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 147844989 is about 12159.1524786886. The cubic root of 147844989 is about 528.7725111553.

The spelling of 147844989 in words is "one hundred forty-seven million, eight hundred forty-four thousand, nine hundred eighty-nine".