15479997 has 16 divisors (see below), whose sum is σ = 22995840. Its totient is φ = 9196992.

The previous prime is 15479993. The next prime is 15480029. The reversal of 15479997 is 79997451.

It is a happy number.

It is not a de Polignac number, because 15479997 - 2² = 15479993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15479993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5713 + ... + 7974.

It is an arithmetic number, because the mean of its divisors is an integer number (1437240).

Almost surely, 2^15479997 is an apocalyptic number.

It is an amenable number.

15479997 is a deficient number, since it is larger than the sum of its proper divisors (7515843).

15479997 is a wasteful number, since it uses less digits than its factorization.

15479997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13732.

The product of its digits is 714420, while the sum is 51.

The square root of 15479997 is about 3934.4627333348. The cubic root of 15479997 is about 249.2242459793.

The spelling of 15479997 in words is "fifteen million, four hundred seventy-nine thousand, nine hundred ninety-seven".