13913869 has 2 divisors, whose sum is σ = 13913870. Its totient is φ = 13913868.

The previous prime is 13913839. The next prime is 13913891. The reversal of 13913869 is 96831931.

13913869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13764100 + 149769 = 3710^2 + 387^2 .

It is a cyclic number.

It is not a de Polignac number, because 13913869 - 2⁹ = 13913357 is a prime.

It is a super-2 number, since 2×13913869² = 387191501098322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13913819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6956934 + 6956935.

It is an arithmetic number, because the mean of its divisors is an integer number (6956935).

Almost surely, 2^13913869 is an apocalyptic number.

It is an amenable number.

13913869 is a deficient number, since it is larger than the sum of its proper divisors (1).

13913869 is an equidigital number, since it uses as much as digits as its factorization.

13913869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 13913869 is about 3730.1298904998. The cubic root of 13913869 is about 240.5189522915.

The spelling of 13913869 in words is "thirteen million, nine hundred thirteen thousand, eight hundred sixty-nine".