15090987 has 4 divisors (see below), whose sum is σ = 20121320. Its totient is φ = 10060656.

The previous prime is 15090983. The next prime is 15091001. The reversal of 15090987 is 78909051.

It is a happy number.

15090987 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.

It is not a de Polignac number, because 15090987 - 2² = 15090983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15090983) 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, 2515162 + ... + 2515167.

It is an arithmetic number, because the mean of its divisors is an integer number (5030330).

Almost surely, 2^15090987 is an apocalyptic number.

15090987 is a deficient number, since it is larger than the sum of its proper divisors (5030333).

15090987 is an equidigital number, since it uses as much as digits as its factorization.

15090987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5030332.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 15090987 is about 3884.7119584340. The cubic root of 15090987 is about 247.1188542167.

The spelling of 15090987 in words is "fifteen million, ninety thousand, nine hundred eighty-seven".