158431749 has 48 divisors (see below), whose sum is σ = 255257856. Its totient is φ = 87091200.

The previous prime is 158431739. The next prime is 158431759. The reversal of 158431749 is 947134851.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (158431739) and next prime (158431759).

It is not a de Polignac number, because 158431749 - 2⁴ = 158431733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 158431749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158431729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 584484 + ... + 584754.

It is an arithmetic number, because the mean of its divisors is an integer number (5317872).

Almost surely, 2^158431749 is an apocalyptic number.

It is an amenable number.

158431749 is a deficient number, since it is larger than the sum of its proper divisors (96826107).

158431749 is a wasteful number, since it uses less digits than its factorization.

158431749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 419 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 158431749 is about 12586.9674266680. The cubic root of 158431749 is about 541.1039931379.

It can be divided in two parts, 1584 and 31749, that added together give a palindrome (33333).

The spelling of 158431749 in words is "one hundred fifty-eight million, four hundred thirty-one thousand, seven hundred forty-nine".