13970999 has 4 divisors (see below), whose sum is σ = 15966864. Its totient is φ = 11975136.

The previous prime is 13970989. The next prime is 13971017. The reversal of 13970999 is 99907931.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13970999 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 (13970939) 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, 997922 + ... + 997935.

It is an arithmetic number, because the mean of its divisors is an integer number (3991716).

Almost surely, 2^13970999 is an apocalyptic number.

13970999 is a deficient number, since it is larger than the sum of its proper divisors (1995865).

13970999 is an equidigital number, since it uses as much as digits as its factorization.

13970999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995864.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 13970999 is about 3737.7799560702. The cubic root of 13970999 is about 240.8476910485.

The spelling of 13970999 in words is "thirteen million, nine hundred seventy thousand, nine hundred ninety-nine".