13919771 has 2 divisors, whose sum is σ = 13919772. Its totient is φ = 13919770.

The previous prime is 13919767. The next prime is 13919779. The reversal of 13919771 is 17791931.

13919771 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 13919771 - 2² = 13919767 is a prime.

It is not a weakly prime, because it can be changed into another prime (13919779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6959885 + 6959886.

It is an arithmetic number, because the mean of its divisors is an integer number (6959886).

Almost surely, 2^13919771 is an apocalyptic number.

13919771 is a deficient number, since it is larger than the sum of its proper divisors (1).

13919771 is an equidigital number, since it uses as much as digits as its factorization.

13919771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11907, while the sum is 38.

The square root of 13919771 is about 3730.9209318880. The cubic root of 13919771 is about 240.5529553473.

The spelling of 13919771 in words is "thirteen million, nine hundred nineteen thousand, seven hundred seventy-one".