158640337 has 2 divisors, whose sum is σ = 158640338. Its totient is φ = 158640336.

The previous prime is 158640331. The next prime is 158640371. The reversal of 158640337 is 733046851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146313216 + 12327121 = 12096^2 + 3511^2 .

It is a cyclic number.

It is not a de Polignac number, because 158640337 - 2²⁷ = 24422609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 158640296 and 158640305.

It is not a weakly prime, because it can be changed into another prime (158640331) 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 as a sum of consecutive naturals, namely, 79320168 + 79320169.

It is an arithmetic number, because the mean of its divisors is an integer number (79320169).

Almost surely, 2^158640337 is an apocalyptic number.

It is an amenable number.

158640337 is a deficient number, since it is larger than the sum of its proper divisors (1).

158640337 is an equidigital number, since it uses as much as digits as its factorization.

158640337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 158640337 is about 12595.2505731327. The cubic root of 158640337 is about 541.3413578149.

The spelling of 158640337 in words is "one hundred fifty-eight million, six hundred forty thousand, three hundred thirty-seven".