158978583 has 12 divisors (see below), whose sum is σ = 230726808. Its totient is φ = 105482160.

The previous prime is 158978579. The next prime is 158978591. The reversal of 158978583 is 385879851.

158978583 is a `hidden beast` number, since 1 + 58 + 9 + 7 + 8 + 583 = 666.

It is not a de Polignac number, because 158978583 - 2² = 158978579 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158978563) 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, 39960 + ... + 43757.

It is an arithmetic number, because the mean of its divisors is an integer number (19227234).

Almost surely, 2^158978583 is an apocalyptic number.

158978583 is a deficient number, since it is larger than the sum of its proper divisors (71748225).

158978583 is a wasteful number, since it uses less digits than its factorization.

158978583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83934 (or 83931 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 54.

The square root of 158978583 is about 12608.6709450283. The cubic root of 158978583 is about 541.7258261644.

The spelling of 158978583 in words is "one hundred fifty-eight million, nine hundred seventy-eight thousand, five hundred eighty-three".