13530520789 has 2 divisors, whose sum is σ = 13530520790. Its totient is φ = 13530520788.

The previous prime is 13530520771. The next prime is 13530520831. The reversal of 13530520789 is 98702503531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10463244100 + 3067276689 = 102290^2 + 55383^2 .

It is a cyclic number.

It is not a de Polignac number, because 13530520789 - 2¹⁵ = 13530488021 is a prime.

It is a super-2 number, since 2×13530520789² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13530520769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765260394 + 6765260395.

It is an arithmetic number, because the mean of its divisors is an integer number (6765260395).

Almost surely, 2^13530520789 is an apocalyptic number.

It is an amenable number.

13530520789 is a deficient number, since it is larger than the sum of its proper divisors (1).

13530520789 is an equidigital number, since it uses as much as digits as its factorization.

13530520789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 13530520789 in words is "thirteen billion, five hundred thirty million, five hundred twenty thousand, seven hundred eighty-nine".