13720877 has 2 divisors, whose sum is σ = 13720878. Its totient is φ = 13720876.

The previous prime is 13720871. The next prime is 13720891. The reversal of 13720877 is 77802731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9616201 + 4104676 = 3101^2 + 2026^2 .

It is an emirp because it is prime and its reverse (77802731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13720877 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13720871) 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, 6860438 + 6860439.

It is an arithmetic number, because the mean of its divisors is an integer number (6860439).

Almost surely, 2^13720877 is an apocalyptic number.

It is an amenable number.

13720877 is a deficient number, since it is larger than the sum of its proper divisors (1).

13720877 is an equidigital number, since it uses as much as digits as its factorization.

13720877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 13720877 is about 3704.1702174711. The cubic root of 13720877 is about 239.4017332727.

The spelling of 13720877 in words is "thirteen million, seven hundred twenty thousand, eight hundred seventy-seven".