13875989 has 2 divisors, whose sum is σ = 13875990. Its totient is φ = 13875988.

The previous prime is 13875977. The next prime is 13876001. The reversal of 13875989 is 98957831.

It is a balanced prime because it is at equal distance from previous prime (13875977) and next prime (13876001).

It can be written as a sum of positive squares in only one way, i.e., 11957764 + 1918225 = 3458^2 + 1385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13875989 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13875919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6937994 + 6937995.

It is an arithmetic number, because the mean of its divisors is an integer number (6937995).

Almost surely, 2^13875989 is an apocalyptic number.

It is an amenable number.

13875989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13875989 is an equidigital number, since it uses as much as digits as its factorization.

13875989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 50.

The square root of 13875989 is about 3725.0488587400. The cubic root of 13875989 is about 240.3004858958.

The spelling of 13875989 in words is "thirteen million, eight hundred seventy-five thousand, nine hundred eighty-nine".