158368309 has 6 divisors (see below), whose sum is σ = 174074390. Its totient is φ = 143971080.

The previous prime is 158368307. The next prime is 158368313. The reversal of 158368309 is 903863851.

It can be written as a sum of positive squares in only one way, i.e., 149084100 + 9284209 = 12210^2 + 3047^2 .

It is not a de Polignac number, because 158368309 - 2¹ = 158368307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158368307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 654294 + ... + 654535.

Almost surely, 2^158368309 is an apocalyptic number.

It is an amenable number.

158368309 is a deficient number, since it is larger than the sum of its proper divisors (15706081).

158368309 is a wasteful number, since it uses less digits than its factorization.

158368309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308851 (or 1308840 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 158368309 is about 12584.4471074418. The cubic root of 158368309 is about 541.0317596779.

The spelling of 158368309 in words is "one hundred fifty-eight million, three hundred sixty-eight thousand, three hundred nine".