13979974 has 4 divisors (see below), whose sum is σ = 20969964. Its totient is φ = 6989986.

The previous prime is 13979963. The next prime is 13979983. The reversal of 13979974 is 47997931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47997931 = 1667 ⋅28793.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3494992 + ... + 3494995.

It is an arithmetic number, because the mean of its divisors is an integer number (5242491).

Almost surely, 2^13979974 is an apocalyptic number.

13979974 is a deficient number, since it is larger than the sum of its proper divisors (6989990).

13979974 is an equidigital number, since it uses as much as digits as its factorization.

13979974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6989989.

The product of its digits is 428652, while the sum is 49.

The square root of 13979974 is about 3738.9803422858. The cubic root of 13979974 is about 240.8992537015.

The spelling of 13979974 in words is "thirteen million, nine hundred seventy-nine thousand, nine hundred seventy-four".