13878974 has 4 divisors (see below), whose sum is σ = 20818464. Its totient is φ = 6939486.

The previous prime is 13878973. The next prime is 13878989. The reversal of 13878974 is 47987831.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13878971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3469742 + ... + 3469745.

It is an arithmetic number, because the mean of its divisors is an integer number (5204616).

Almost surely, 2^13878974 is an apocalyptic number.

13878974 is a deficient number, since it is larger than the sum of its proper divisors (6939490).

13878974 is an equidigital number, since it uses as much as digits as its factorization.

13878974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6939489.

The product of its digits is 338688, while the sum is 47.

The square root of 13878974 is about 3725.4495030801. The cubic root of 13878974 is about 240.3177157913.

The spelling of 13878974 in words is "thirteen million, eight hundred seventy-eight thousand, nine hundred seventy-four".