158747309 has 12 divisors (see below), whose sum is σ = 195528924. Its totient is φ = 128064384.

The previous prime is 158747293. The next prime is 158747359. The reversal of 158747309 is 903747851.

It can be written as a sum of positive squares in 2 ways, for example, as 88774084 + 69973225 = 9422^2 + 8365^2 .

It is not a de Polignac number, because 158747309 - 2⁴ = 158747293 is a prime.

It is a super-2 number, since 2×158747309² = 50401416229482962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 158747309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158747359) 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, 94454 + ... + 96119.

It is an arithmetic number, because the mean of its divisors is an integer number (16294077).

Almost surely, 2^158747309 is an apocalyptic number.

It is an amenable number.

158747309 is a deficient number, since it is larger than the sum of its proper divisors (36781615).

158747309 is a wasteful number, since it uses less digits than its factorization.

158747309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190604 (or 190597 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 158747309 is about 12599.4963788240. The cubic root of 158747309 is about 541.4630069023.

The spelling of 158747309 in words is "one hundred fifty-eight million, seven hundred forty-seven thousand, three hundred nine".