15479999 has 4 divisors (see below), whose sum is σ = 15487920. Its totient is φ = 15472080.

The previous prime is 15479993. The next prime is 15480029. The reversal of 15479999 is 99997451.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 99997451 = 17 ⋅5882203.

It is a cyclic number.

It is not a de Polignac number, because 15479999 - 2¹⁶ = 15414463 is a prime.

It is a Duffinian number.

15479999 is a modest number, since divided by 9999 gives 1547 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 15479999.

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 3 ways as a sum of consecutive naturals, for example, 1307 + ... + 5715.

It is an arithmetic number, because the mean of its divisors is an integer number (3871980).

Almost surely, 2^15479999 is an apocalyptic number.

15479999 is a deficient number, since it is larger than the sum of its proper divisors (7921).

15479999 is an equidigital number, since it uses as much as digits as its factorization.

15479999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7920.

The product of its digits is 918540, while the sum is 53.

The square root of 15479999 is about 3934.4629874991. The cubic root of 15479999 is about 249.2242567125.

The spelling of 15479999 in words is "fifteen million, four hundred seventy-nine thousand, nine hundred ninety-nine".