158749731 has 24 divisors (see below), whose sum is σ = 275857920. Its totient is φ = 85939056.

The previous prime is 158749727. The next prime is 158749739. The reversal of 158749731 is 137947851.

158749731 is a `hidden beast` number, since 158 + 7 + 497 + 3 + 1 = 666.

It is not a de Polignac number, because 158749731 - 2² = 158749727 is a prime.

It is a super-2 number, since 2×158749731² = 50402954185144722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (158749739) 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 23 ways as a sum of consecutive naturals, for example, 65115 + ... + 67508.

It is an arithmetic number, because the mean of its divisors is an integer number (11494080).

Almost surely, 2^158749731 is an apocalyptic number.

158749731 is a deficient number, since it is larger than the sum of its proper divisors (117108189).

158749731 is a wasteful number, since it uses less digits than its factorization.

158749731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132655 (or 132652 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 158749731 is about 12599.5924934103. The cubic root of 158749731 is about 541.4657605799.

The spelling of 158749731 in words is "one hundred fifty-eight million, seven hundred forty-nine thousand, seven hundred thirty-one".