13907813 has 2 divisors, whose sum is σ = 13907814. Its totient is φ = 13907812.

The previous prime is 13907779. The next prime is 13907821. The reversal of 13907813 is 31870931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11142244 + 2765569 = 3338^2 + 1663^2 .

It is a cyclic number.

It is not a de Polignac number, because 13907813 - 2⁶ = 13907749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13907813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13907833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6953906 + 6953907.

It is an arithmetic number, because the mean of its divisors is an integer number (6953907).

Almost surely, 2^13907813 is an apocalyptic number.

It is an amenable number.

13907813 is a deficient number, since it is larger than the sum of its proper divisors (1).

13907813 is an equidigital number, since it uses as much as digits as its factorization.

13907813 is an odious number, because the sum of its binary digits is odd.

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

The square root of 13907813 is about 3729.3180341719. The cubic root of 13907813 is about 240.4840520024.

The spelling of 13907813 in words is "thirteen million, nine hundred seven thousand, eight hundred thirteen".