13624997 has 4 divisors (see below), whose sum is σ = 13957356. Its totient is φ = 13292640.

The previous prime is 13624987. The next prime is 13624999. The reversal of 13624997 is 79942631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79942631 = 659 ⋅121309.

It can be written as a sum of positive squares in 2 ways, for example, as 2328676 + 11296321 = 1526^2 + 3361^2 .

It is a cyclic number.

It is not a de Polignac number, because 13624997 - 2⁴ = 13624981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 332317 = 13624997 / (1 + 3 + 6 + 2 + 4 + 9 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13624999) 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, 166118 + ... + 166199.

It is an arithmetic number, because the mean of its divisors is an integer number (3489339).

Almost surely, 2^13624997 is an apocalyptic number.

It is an amenable number.

13624997 is a deficient number, since it is larger than the sum of its proper divisors (332359).

13624997 is an equidigital number, since it uses as much as digits as its factorization.

13624997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332358.

The product of its digits is 81648, while the sum is 41.

The square root of 13624997 is about 3691.2053586871. The cubic root of 13624997 is about 238.8427915220.

The spelling of 13624997 in words is "thirteen million, six hundred twenty-four thousand, nine hundred ninety-seven".