13961525989 has 2 divisors, whose sum is σ = 13961525990. Its totient is φ = 13961525988.

The previous prime is 13961525953. The next prime is 13961526037. The reversal of 13961525989 is 98952516931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9609880900 + 4351645089 = 98030^2 + 65967^2 .

It is a cyclic number.

It is not a de Polignac number, because 13961525989 - 2²¹ = 13959428837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13961525939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6980762994 + 6980762995.

It is an arithmetic number, because the mean of its divisors is an integer number (6980762995).

Almost surely, 2^13961525989 is an apocalyptic number.

It is an amenable number.

13961525989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13961525989 is an equidigital number, since it uses as much as digits as its factorization.

13961525989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5248800, while the sum is 58.

The spelling of 13961525989 in words is "thirteen billion, nine hundred sixty-one million, five hundred twenty-five thousand, nine hundred eighty-nine".