14978993 has 4 divisors (see below), whose sum is σ = 15495540. Its totient is φ = 14462448.

The previous prime is 14978987. The next prime is 14979001. The reversal of 14978993 is 39987941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2917264 + 12061729 = 1708^2 + 3473^2 .

It is a cyclic number.

It is not a de Polignac number, because 14978993 - 2²⁰ = 13930417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14978963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258230 + ... + 258287.

It is an arithmetic number, because the mean of its divisors is an integer number (3873885).

Almost surely, 2^14978993 is an apocalyptic number.

It is an amenable number.

14978993 is a deficient number, since it is larger than the sum of its proper divisors (516547).

14978993 is an equidigital number, since it uses as much as digits as its factorization.

14978993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516546.

The product of its digits is 489888, while the sum is 50.

The square root of 14978993 is about 3870.2704039899. The cubic root of 14978993 is about 246.5060253867.

The spelling of 14978993 in words is "fourteen million, nine hundred seventy-eight thousand, nine hundred ninety-three".