15000091 has 4 divisors (see below), whose sum is σ = 15012432. Its totient is φ = 14987752.

The previous prime is 15000079. The next prime is 15000127. The reversal of 15000091 is 19000051.

15000091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19000051 = 7 ⋅2714293.

It is a cyclic number.

It is not a de Polignac number, because 15000091 - 2¹⁹ = 14475803 is a prime.

It is a Duffinian number.

15000091 is a modest number, since divided by 91 gives 15 as remainder.

It is not an unprimeable number, because it can be changed into a prime (15000031) 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, 4120 + ... + 6853.

It is an arithmetic number, because the mean of its divisors is an integer number (3753108).

Almost surely, 2^15000091 is an apocalyptic number.

15000091 is a deficient number, since it is larger than the sum of its proper divisors (12341).

15000091 is a wasteful number, since it uses less digits than its factorization.

15000091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12340.

The product of its (nonzero) digits is 45, while the sum is 16.

The square root of 15000091 is about 3872.9950942391. The cubic root of 15000091 is about 246.6217061549.

The spelling of 15000091 in words is "fifteen million, ninety-one", and thus it is an aban number and an uban number.