14778989 has 4 divisors (see below), whose sum is σ = 14809824. Its totient is φ = 14748156.

The previous prime is 14778977. The next prime is 14778991. The reversal of 14778989 is 98987741.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98987741 = 8543 ⋅11587.

It is a cyclic number.

It is not a de Polignac number, because 14778989 - 2²⁰ = 13730413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14778989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14778919) 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, 14687 + ... + 15660.

It is an arithmetic number, because the mean of its divisors is an integer number (3702456).

Almost surely, 2^14778989 is an apocalyptic number.

It is an amenable number.

14778989 is a deficient number, since it is larger than the sum of its proper divisors (30835).

14778989 is an equidigital number, since it uses as much as digits as its factorization.

14778989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30834.

The product of its digits is 1016064, while the sum is 53.

The square root of 14778989 is about 3844.3450677586. The cubic root of 14778989 is about 245.4039649653.

The spelling of 14778989 in words is "fourteen million, seven hundred seventy-eight thousand, nine hundred eighty-nine".