158587393 has 2 divisors, whose sum is σ = 158587394. Its totient is φ = 158587392.

The previous prime is 158587381. The next prime is 158587423. The reversal of 158587393 is 393785851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142850304 + 15737089 = 11952^2 + 3967^2 .

It is a cyclic number.

It is not a de Polignac number, because 158587393 - 2²⁵ = 125032961 is a prime.

It is a super-2 number, since 2×158587393² = 50299922437072898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (158587993) 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, 79293696 + 79293697.

It is an arithmetic number, because the mean of its divisors is an integer number (79293697).

Almost surely, 2^158587393 is an apocalyptic number.

It is an amenable number.

158587393 is a deficient number, since it is larger than the sum of its proper divisors (1).

158587393 is an equidigital number, since it uses as much as digits as its factorization.

158587393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 49.

The square root of 158587393 is about 12593.1486531368. The cubic root of 158587393 is about 541.2811294048.

The spelling of 158587393 in words is "one hundred fifty-eight million, five hundred eighty-seven thousand, three hundred ninety-three".