130642489 has 2 divisors, whose sum is σ = 130642490. Its totient is φ = 130642488.

The previous prime is 130642481. The next prime is 130642511. The reversal of 130642489 is 984246031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116467264 + 14175225 = 10792^2 + 3765^2 .

It is a cyclic number.

It is not a de Polignac number, because 130642489 - 2³ = 130642481 is a prime.

It is not a weakly prime, because it can be changed into another prime (130642481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65321244 + 65321245.

It is an arithmetic number, because the mean of its divisors is an integer number (65321245).

Almost surely, 2^130642489 is an apocalyptic number.

It is an amenable number.

130642489 is a deficient number, since it is larger than the sum of its proper divisors (1).

130642489 is an equidigital number, since it uses as much as digits as its factorization.

130642489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 130642489 is about 11429.8945314469. The cubic root of 130642489 is about 507.4128741372.

It can be divided in two parts, 130642 and 489, that added together give a palindrome (131131).

The spelling of 130642489 in words is "one hundred thirty million, six hundred forty-two thousand, four hundred eighty-nine".