15489949 has 2 divisors, whose sum is σ = 15489950. Its totient is φ = 15489948.

The previous prime is 15489937. The next prime is 15489953. The reversal of 15489949 is 94998451.

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., 10517049 + 4972900 = 3243^2 + 2230^2 .

It is a cyclic number.

It is not a de Polignac number, because 15489949 - 2⁵ = 15489917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15489979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7744974 + 7744975.

It is an arithmetic number, because the mean of its divisors is an integer number (7744975).

Almost surely, 2^15489949 is an apocalyptic number.

It is an amenable number.

15489949 is a deficient number, since it is larger than the sum of its proper divisors (1).

15489949 is an equidigital number, since it uses as much as digits as its factorization.

15489949 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 15489949 is about 3935.7272517287. The cubic root of 15489949 is about 249.2776428106.

The spelling of 15489949 in words is "fifteen million, four hundred eighty-nine thousand, nine hundred forty-nine".