15972479 has 4 divisors (see below), whose sum is σ = 16343976. Its totient is φ = 15600984.

The previous prime is 15972449. The next prime is 15972497. The reversal of 15972479 is 97427951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97427951 = 7559 ⋅12889.

It is a cyclic number.

It is not a de Polignac number, because 15972479 - 2¹² = 15968383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15972449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185684 + ... + 185769.

It is an arithmetic number, because the mean of its divisors is an integer number (4085994).

Almost surely, 2^15972479 is an apocalyptic number.

15972479 is a deficient number, since it is larger than the sum of its proper divisors (371497).

15972479 is an equidigital number, since it uses as much as digits as its factorization.

15972479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371496.

The product of its digits is 158760, while the sum is 44.

The square root of 15972479 is about 3996.5583944189. The cubic root of 15972479 is about 251.8396508670.

The spelling of 15972479 in words is "fifteen million, nine hundred seventy-two thousand, four hundred seventy-nine".