15000997 has 4 divisors (see below), whose sum is σ = 16364736. Its totient is φ = 13637260.

The previous prime is 15000977. The next prime is 15001001. The reversal of 15000997 is 79900051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15000997 - 2¹⁵ = 14968229 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15000967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681853 + ... + 681874.

It is an arithmetic number, because the mean of its divisors is an integer number (4091184).

Almost surely, 2^15000997 is an apocalyptic number.

It is an amenable number.

15000997 is a deficient number, since it is larger than the sum of its proper divisors (1363739).

15000997 is a wasteful number, since it uses less digits than its factorization.

15000997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363738.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 15000997 is about 3873.1120562153. The cubic root of 15000997 is about 246.6266713419.

The spelling of 15000997 in words is "fifteen million, nine hundred ninety-seven", and thus it is an aban number.