147944989 has 6 divisors (see below), whose sum is σ = 152872350. Its totient is φ = 143171640.

The previous prime is 147944987. The next prime is 147945013. The reversal of 147944989 is 989449741.

147944989 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 only one way, i.e., 146168100 + 1776889 = 12090^2 + 1333^2 .

It is not a de Polignac number, because 147944989 - 2¹ = 147944987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147944987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76014 + ... + 77935.

It is an arithmetic number, because the mean of its divisors is an integer number (25478725).

Almost surely, 2^147944989 is an apocalyptic number.

It is an amenable number.

147944989 is a deficient number, since it is larger than the sum of its proper divisors (4927361).

147944989 is an equidigital number, since it uses as much as digits as its factorization.

147944989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154011 (or 153980 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 55.

The square root of 147944989 is about 12163.2639122893. The cubic root of 147944989 is about 528.8917020597.

The spelling of 147944989 in words is "one hundred forty-seven million, nine hundred forty-four thousand, nine hundred eighty-nine".