13861889 has 2 divisors, whose sum is σ = 13861890. Its totient is φ = 13861888.

The previous prime is 13861879. The next prime is 13861901. The reversal of 13861889 is 98816831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11505664 + 2356225 = 3392^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 13861889 - 2⁸ = 13861633 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13861819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6930944 + 6930945.

It is an arithmetic number, because the mean of its divisors is an integer number (6930945).

Almost surely, 2^13861889 is an apocalyptic number.

It is an amenable number.

13861889 is a deficient number, since it is larger than the sum of its proper divisors (1).

13861889 is an equidigital number, since it uses as much as digits as its factorization.

13861889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 44.

The square root of 13861889 is about 3723.1557850834. The cubic root of 13861889 is about 240.2190650293.

The spelling of 13861889 in words is "thirteen million, eight hundred sixty-one thousand, eight hundred eighty-nine".