13409593921 has 2 divisors, whose sum is σ = 13409593922. Its totient is φ = 13409593920.

The previous prime is 13409593871. The next prime is 13409593963. The reversal of 13409593921 is 12939590431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9292960000 + 4116633921 = 96400^2 + 64161^2 .

It is an emirp because it is prime and its reverse (12939590431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13409593921 - 2¹⁵ = 13409561153 is a prime.

It is a super-2 number, since 2×13409593921² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13409593321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6704796960 + 6704796961.

It is an arithmetic number, because the mean of its divisors is an integer number (6704796961).

Almost surely, 2^13409593921 is an apocalyptic number.

It is an amenable number.

13409593921 is a deficient number, since it is larger than the sum of its proper divisors (1).

13409593921 is an equidigital number, since it uses as much as digits as its factorization.

13409593921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 262440, while the sum is 46.

The spelling of 13409593921 in words is "thirteen billion, four hundred nine million, five hundred ninety-three thousand, nine hundred twenty-one".