15668049 has 12 divisors (see below), whose sum is σ = 21136976. Its totient is φ = 10323288.

The previous prime is 15668047. The next prime is 15668077. The reversal of 15668049 is 94086651.

It is not a de Polignac number, because 15668049 - 2¹ = 15668047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15667998 and 15668016.

It is not an unprimeable number, because it can be changed into a prime (15668041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87442 + ... + 87620.

Almost surely, 2^15668049 is an apocalyptic number.

It is an amenable number.

15668049 is a deficient number, since it is larger than the sum of its proper divisors (5468927).

15668049 is an equidigital number, since it uses as much as digits as its factorization.

15668049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 15668049 is about 3958.2886453618. The cubic root of 15668049 is about 250.2293841340.

The spelling of 15668049 in words is "fifteen million, six hundred sixty-eight thousand, forty-nine".