13970813 has 8 divisors (see below), whose sum is σ = 14315448. Its totient is φ = 13630464.

The previous prime is 13970783. The next prime is 13970839. The reversal of 13970813 is 31807931.

It can be written as a sum of positive squares in 4 ways, for example, as 851929 + 13118884 = 923^2 + 3622^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13970813 - 2⁸ = 13970557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13970813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13970843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6095 + ... + 8067.

It is an arithmetic number, because the mean of its divisors is an integer number (1789431).

Almost surely, 2^13970813 is an apocalyptic number.

It is an amenable number.

13970813 is a deficient number, since it is larger than the sum of its proper divisors (344635).

13970813 is an equidigital number, since it uses as much as digits as its factorization.

13970813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 13970813 is about 3737.7550749079. The cubic root of 13970813 is about 240.8466222185.

The spelling of 13970813 in words is "thirteen million, nine hundred seventy thousand, eight hundred thirteen".