15000397 has 4 divisors (see below), whose sum is σ = 15009820. Its totient is φ = 14990976.

The previous prime is 15000389. The next prime is 15000407. The reversal of 15000397 is 79300051.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 9897316 + 5103081 = 3146^2 + 2259^2 .

It is a cyclic number.

It is not a de Polignac number, because 15000397 - 2³ = 15000389 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 (15000317) 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, 1668 + ... + 5725.

It is an arithmetic number, because the mean of its divisors is an integer number (3752455).

Almost surely, 2^15000397 is an apocalyptic number.

It is an amenable number.

15000397 is a deficient number, since it is larger than the sum of its proper divisors (9423).

15000397 is an equidigital number, since it uses as much as digits as its factorization.

15000397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9422.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 15000397 is about 3873.0345983479. The cubic root of 15000397 is about 246.6233831609.

The spelling of 15000397 in words is "fifteen million, three hundred ninety-seven", and thus it is an aban number.