15910649 has 2 divisors, whose sum is σ = 15910650. Its totient is φ = 15910648.

The previous prime is 15910627. The next prime is 15910651. The reversal of 15910649 is 94601951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14115049 + 1795600 = 3757^2 + 1340^2 .

It is an emirp because it is prime and its reverse (94601951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15910649 - 2²⁰ = 14862073 is a prime.

Together with 15910651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15910849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7955324 + 7955325.

It is an arithmetic number, because the mean of its divisors is an integer number (7955325).

Almost surely, 2^15910649 is an apocalyptic number.

It is an amenable number.

15910649 is a deficient number, since it is larger than the sum of its proper divisors (1).

15910649 is an equidigital number, since it uses as much as digits as its factorization.

15910649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 15910649 is about 3988.8154883374. The cubic root of 15910649 is about 251.5142707511.

The spelling of 15910649 in words is "fifteen million, nine hundred ten thousand, six hundred forty-nine".