15057993 has 4 divisors (see below), whose sum is σ = 20077328. Its totient is φ = 10038660.

The previous prime is 15057967. The next prime is 15058061. The reversal of 15057993 is 39975051.

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 not a de Polignac number, because 15057993 - 2⁸ = 15057737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15057923) 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 3 ways as a sum of consecutive naturals, for example, 2509663 + ... + 2509668.

It is an arithmetic number, because the mean of its divisors is an integer number (5019332).

Almost surely, 2^15057993 is an apocalyptic number.

It is an amenable number.

15057993 is a deficient number, since it is larger than the sum of its proper divisors (5019335).

15057993 is an equidigital number, since it uses as much as digits as its factorization.

15057993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019334.

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 15057993 is about 3880.4629878405. The cubic root of 15057993 is about 246.9386276845.

The spelling of 15057993 in words is "fifteen million, fifty-seven thousand, nine hundred ninety-three".