158979943 has 12 divisors (see below), whose sum is σ = 167093640. Its totient is φ = 151058432.

The previous prime is 158979917. The next prime is 158979967. The reversal of 158979943 is 349979851.

It is not a de Polignac number, because 158979943 - 2¹⁷ = 158848871 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 (158979983) 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, 618471 + ... + 618727.

It is an arithmetic number, because the mean of its divisors is an integer number (13924470).

Almost surely, 2^158979943 is an apocalyptic number.

158979943 is a deficient number, since it is larger than the sum of its proper divisors (8113697).

158979943 is an frugal number, since it uses more digits than its factorization.

158979943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 369 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 55.

The square root of 158979943 is about 12608.7248760531. The cubic root of 158979943 is about 541.7273709113.

The spelling of 158979943 in words is "one hundred fifty-eight million, nine hundred seventy-nine thousand, nine hundred forty-three".