13973999 has 4 divisors (see below), whose sum is σ = 15048936. Its totient is φ = 12899064.

The previous prime is 13973951. The next prime is 13974001. The reversal of 13973999 is 99937931.

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: 99937931 = 281 ⋅355651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13973999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13973929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537449 + ... + 537474.

It is an arithmetic number, because the mean of its divisors is an integer number (3762234).

Almost surely, 2^13973999 is an apocalyptic number.

13973999 is a deficient number, since it is larger than the sum of its proper divisors (1074937).

13973999 is a wasteful number, since it uses less digits than its factorization.

13973999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074936.

The product of its digits is 413343, while the sum is 50.

The square root of 13973999 is about 3738.1812422621. The cubic root of 13973999 is about 240.8649289321.

The spelling of 13973999 in words is "thirteen million, nine hundred seventy-three thousand, nine hundred ninety-nine".