15799489 has 2 divisors, whose sum is σ = 15799490. Its totient is φ = 15799488.

The previous prime is 15799453. The next prime is 15799493. The reversal of 15799489 is 98499751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14311089 + 1488400 = 3783^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 15799489 - 2¹⁵ = 15766721 is a prime.

It is a super-2 number, since 2×15799489² = 499247705322242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15799499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7899744 + 7899745.

It is an arithmetic number, because the mean of its divisors is an integer number (7899745).

Almost surely, 2^15799489 is an apocalyptic number.

It is an amenable number.

15799489 is a deficient number, since it is larger than the sum of its proper divisors (1).

15799489 is an equidigital number, since it uses as much as digits as its factorization.

15799489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 52.

The square root of 15799489 is about 3974.8571043498. The cubic root of 15799489 is about 250.9271652079.

The spelling of 15799489 in words is "fifteen million, seven hundred ninety-nine thousand, four hundred eighty-nine".