13977811 has 2 divisors, whose sum is σ = 13977812. Its totient is φ = 13977810.

The previous prime is 13977809. The next prime is 13977827. The reversal of 13977811 is 11877931.

13977811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13977811 - 2¹ = 13977809 is a prime.

Together with 13977809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13977871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6988905 + 6988906.

It is an arithmetic number, because the mean of its divisors is an integer number (6988906).

Almost surely, 2^13977811 is an apocalyptic number.

13977811 is a deficient number, since it is larger than the sum of its proper divisors (1).

13977811 is an equidigital number, since it uses as much as digits as its factorization.

13977811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 37.

The square root of 13977811 is about 3738.6910811138. The cubic root of 13977811 is about 240.8868289773.

The spelling of 13977811 in words is "thirteen million, nine hundred seventy-seven thousand, eight hundred eleven".