15078993 has 8 divisors (see below), whose sum is σ = 20139168. Its totient is φ = 10035744.

The previous prime is 15078979. The next prime is 15079013. The reversal of 15078993 is 39987051.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15078993 - 2⁸ = 15078737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15078793) 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 7 ways as a sum of consecutive naturals, for example, 1980 + ... + 5837.

It is an arithmetic number, because the mean of its divisors is an integer number (2517396).

Almost surely, 2^15078993 is an apocalyptic number.

It is an amenable number.

15078993 is a deficient number, since it is larger than the sum of its proper divisors (5060175).

15078993 is an equidigital number, since it uses as much as digits as its factorization.

15078993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8463.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 15078993 is about 3883.1679077784. The cubic root of 15078993 is about 247.0533685704.

The spelling of 15078993 in words is "fifteen million, seventy-eight thousand, nine hundred ninety-three".