158985423 has 14 divisors (see below), whose sum is σ = 238370184. Its totient is φ = 105989796.

The previous prime is 158985419. The next prime is 158985427. The reversal of 158985423 is 324589851.

158985423 is a `hidden beast` number, since 15 + 8 + 98 + 542 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (158985419) and next prime (158985427).

It is not a de Polignac number, because 158985423 - 2² = 158985419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158985427) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 108315 + ... + 109772.

Almost surely, 2^158985423 is an apocalyptic number.

158985423 is a deficient number, since it is larger than the sum of its proper divisors (79384761).

158985423 is an frugal number, since it uses more digits than its factorization.

158985423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218105 (or 218090 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 158985423 is about 12608.9421840216. The cubic root of 158985423 is about 541.7335952434.

It can be divided in two parts, 15898 and 5423, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 158985423 in words is "one hundred fifty-eight million, nine hundred eighty-five thousand, four hundred twenty-three".