158761489 has 2 divisors, whose sum is σ = 158761490. Its totient is φ = 158761488.

The previous prime is 158761459. The next prime is 158761501. The reversal of 158761489 is 984167851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154181889 + 4579600 = 12417^2 + 2140^2 .

It is an emirp because it is prime and its reverse (984167851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158761489 - 2¹⁵ = 158728721 is a prime.

It is not a weakly prime, because it can be changed into another prime (158761409) 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 as a sum of consecutive naturals, namely, 79380744 + 79380745.

It is an arithmetic number, because the mean of its divisors is an integer number (79380745).

Almost surely, 2^158761489 is an apocalyptic number.

It is an amenable number.

158761489 is a deficient number, since it is larger than the sum of its proper divisors (1).

158761489 is an equidigital number, since it uses as much as digits as its factorization.

158761489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 49.

The square root of 158761489 is about 12600.0590871630. The cubic root of 158761489 is about 541.4791283658.

The spelling of 158761489 in words is "one hundred fifty-eight million, seven hundred sixty-one thousand, four hundred eighty-nine".