13990807 has 2 divisors, whose sum is σ = 13990808. Its totient is φ = 13990806.

The previous prime is 13990793. The next prime is 13990841. The reversal of 13990807 is 70809931.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13990807 is a prime.

It is a super-2 number, since 2×13990807² = 391485361022498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13991807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6995403 + 6995404.

It is an arithmetic number, because the mean of its divisors is an integer number (6995404).

Almost surely, 2^13990807 is an apocalyptic number.

13990807 is a deficient number, since it is larger than the sum of its proper divisors (1).

13990807 is an equidigital number, since it uses as much as digits as its factorization.

13990807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 13990807 is about 3740.4287187433. The cubic root of 13990807 is about 240.9614614432.

The spelling of 13990807 in words is "thirteen million, nine hundred ninety thousand, eight hundred seven".