158949317 has 2 divisors, whose sum is σ = 158949318. Its totient is φ = 158949316.

The previous prime is 158949311. The next prime is 158949361. The reversal of 158949317 is 713949851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105863521 + 53085796 = 10289^2 + 7286^2 .

It is a cyclic number.

It is not a de Polignac number, because 158949317 - 2¹² = 158945221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158949311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79474658 + 79474659.

It is an arithmetic number, because the mean of its divisors is an integer number (79474659).

Almost surely, 2^158949317 is an apocalyptic number.

It is an amenable number.

158949317 is a deficient number, since it is larger than the sum of its proper divisors (1).

158949317 is an equidigital number, since it uses as much as digits as its factorization.

158949317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 158949317 is about 12607.5103410626. The cubic root of 158949317 is about 541.6925824392.

The spelling of 158949317 in words is "one hundred fifty-eight million, nine hundred forty-nine thousand, three hundred seventeen".