143961489 has 32 divisors (see below), whose sum is σ = 251617280. Its totient is φ = 79606800.

The previous prime is 143961479. The next prime is 143961497. The reversal of 143961489 is 984169341.

It is not a de Polignac number, because 143961489 - 2⁴ = 143961473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143961479) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6427 + ... + 18144.

It is an arithmetic number, because the mean of its divisors is an integer number (7863040).

Almost surely, 2^143961489 is an apocalyptic number.

It is an amenable number.

143961489 is a deficient number, since it is larger than the sum of its proper divisors (107655791).

143961489 is a wasteful number, since it uses less digits than its factorization.

143961489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24618 (or 24612 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 143961489 is about 11998.3952677014. The cubic root of 143961489 is about 524.1015490407.

The spelling of 143961489 in words is "one hundred forty-three million, nine hundred sixty-one thousand, four hundred eighty-nine".