13520553989 has 2 divisors, whose sum is σ = 13520553990. Its totient is φ = 13520553988.

The previous prime is 13520553961. The next prime is 13520553997. The reversal of 13520553989 is 98935502531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12163884100 + 1356669889 = 110290^2 + 36833^2 .

It is a cyclic number.

It is not a de Polignac number, because 13520553989 - 2³² = 9225586693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13520553089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760276994 + 6760276995.

It is an arithmetic number, because the mean of its divisors is an integer number (6760276995).

Almost surely, 2^13520553989 is an apocalyptic number.

It is an amenable number.

13520553989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520553989 is an equidigital number, since it uses as much as digits as its factorization.

13520553989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458000, while the sum is 50.

The spelling of 13520553989 in words is "thirteen billion, five hundred twenty million, five hundred fifty-three thousand, nine hundred eighty-nine".