13687974 has 16 divisors (see below), whose sum is σ = 30417840. Its totient is φ = 4562640.

The previous prime is 13687969. The next prime is 13687987. The reversal of 13687974 is 47978631.

13687974 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126687 + ... + 126794.

It is an arithmetic number, because the mean of its divisors is an integer number (1901115).

Almost surely, 2^13687974 is an apocalyptic number.

13687974 is an abundant number, since it is smaller than the sum of its proper divisors (16729866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13687974 is a wasteful number, since it uses less digits than its factorization.

13687974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253492 (or 253486 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 13687974 is about 3699.7262060861. The cubic root of 13687974 is about 239.2102163584.

The spelling of 13687974 in words is "thirteen million, six hundred eighty-seven thousand, nine hundred seventy-four".