13202699409 has 45 divisors (see below), whose sum is σ = 20978879691. Its totient is φ = 8273016000.

The previous prime is 13202699371. The next prime is 13202699459. The reversal of 13202699409 is 90499620231.

It is a happy number.

The square root of 13202699409 is 114903.

It is a perfect power (a square), and thus also a powerful number.

13202699409 is a `hidden beast` number, since 132 + 0 + 26 + 99 + 409 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10278918225 + 2923781184 = 101385^2 + 54072^2 .

It is not a de Polignac number, because 13202699409 - 2²⁵ = 13169144977 is a prime.

It is a super-2 number, since 2×13202699409² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13202699459) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 17579784 + ... + 17580534.

Almost surely, 2^13202699409 is an apocalyptic number.

13202699409 is the 114903-rd square number.

13202699409 is the 57452-nd centered octagonal number.

It is an amenable number.

13202699409 is a deficient number, since it is larger than the sum of its proper divisors (7776180282).

13202699409 is an frugal number, since it uses more digits than its factorization.

13202699409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The spelling of 13202699409 in words is "thirteen billion, two hundred two million, six hundred ninety-nine thousand, four hundred nine".