158320537 has 2 divisors, whose sum is σ = 158320538. Its totient is φ = 158320536.

The previous prime is 158320501. The next prime is 158320549. The reversal of 158320537 is 735023851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110586256 + 47734281 = 10516^2 + 6909^2 .

It is a cyclic number.

It is not a de Polignac number, because 158320537 - 2²⁷ = 24102809 is a prime.

It is not a weakly prime, because it can be changed into another prime (158320237) 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, 79160268 + 79160269.

It is an arithmetic number, because the mean of its divisors is an integer number (79160269).

Almost surely, 2^158320537 is an apocalyptic number.

It is an amenable number.

158320537 is a deficient number, since it is larger than the sum of its proper divisors (1).

158320537 is an equidigital number, since it uses as much as digits as its factorization.

158320537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 158320537 is about 12582.5489071173. The cubic root of 158320537 is about 540.9773532362.

The spelling of 158320537 in words is "one hundred fifty-eight million, three hundred twenty thousand, five hundred thirty-seven".