15949489 has 2 divisors, whose sum is σ = 15949490. Its totient is φ = 15949488.

The previous prime is 15949471. The next prime is 15949499. The reversal of 15949489 is 98494951.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14311089 + 1638400 = 3783^2 + 1280^2 .

It is a cyclic number.

It is not a de Polignac number, because 15949489 - 2⁷ = 15949361 is a prime.

It is a super-2 number, since 2×15949489² = 508772398722242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15949429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7974744 + 7974745.

It is an arithmetic number, because the mean of its divisors is an integer number (7974745).

Almost surely, 2^15949489 is an apocalyptic number.

It is an amenable number.

15949489 is a deficient number, since it is larger than the sum of its proper divisors (1).

15949489 is an equidigital number, since it uses as much as digits as its factorization.

15949489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 49.

The square root of 15949489 is about 3993.6811339915. The cubic root of 15949489 is about 251.7187643170.

The spelling of 15949489 in words is "fifteen million, nine hundred forty-nine thousand, four hundred eighty-nine".