15108993 has 6 divisors (see below), whose sum is σ = 21824114. Its totient is φ = 10072656.

The previous prime is 15108983. The next prime is 15109007. The reversal of 15108993 is 39980151.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9072144 + 6036849 = 3012^2 + 2457^2 .

It is not a de Polignac number, because 15108993 - 2⁹ = 15108481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15108943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 839380 + ... + 839397.

Almost surely, 2^15108993 is an apocalyptic number.

It is an amenable number.

15108993 is a deficient number, since it is larger than the sum of its proper divisors (6715121).

15108993 is a wasteful number, since it uses less digits than its factorization.

15108993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678783 (or 1678780 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 15108993 is about 3887.0288138886. The cubic root of 15108993 is about 247.2170994707.

The spelling of 15108993 in words is "fifteen million, one hundred eight thousand, nine hundred ninety-three".