15979465 has 4 divisors (see below), whose sum is σ = 19175364. Its totient is φ = 12783568.

The previous prime is 15979451. The next prime is 15979471. The reversal of 15979465 is 56497951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56497951 = 67 ⋅843253.

It can be written as a sum of positive squares in 2 ways, for example, as 5345344 + 10634121 = 2312^2 + 3261^2 .

It is a cyclic number.

It is not a de Polignac number, because 15979465 - 2¹³ = 15971273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1597942 + ... + 1597951.

It is an arithmetic number, because the mean of its divisors is an integer number (4793841).

Almost surely, 2^15979465 is an apocalyptic number.

It is an amenable number.

15979465 is a deficient number, since it is larger than the sum of its proper divisors (3195899).

15979465 is an equidigital number, since it uses as much as digits as its factorization.

15979465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3195898.

The product of its digits is 340200, while the sum is 46.

The square root of 15979465 is about 3997.4323008651. The cubic root of 15979465 is about 251.8763618322.

It can be divided in two parts, 1597946 and 5, that added together give a palindrome (1597951).

The spelling of 15979465 in words is "fifteen million, nine hundred seventy-nine thousand, four hundred sixty-five".