12913367769 has 9 divisors (see below), whose sum is σ = 18653134773. Its totient is φ = 8608684572.

The previous prime is 12913367767. The next prime is 12913367771. The reversal of 12913367769 is 96776331921.

It is a happy number.

The square root of 12913367769 is 113637.

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

It is an interprime number because it is at equal distance from previous prime (12913367767) and next prime (12913367771).

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 12913367769 - 2¹ = 12913367767 is a prime.

It is a super-2 number, since 2×12913367769² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12913367767) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 321972 + ... + 359850.

Almost surely, 2^12913367769 is an apocalyptic number.

12913367769 is the 113637-th square number.

12913367769 is the 56819-th centered octagonal number.

It is an amenable number.

12913367769 is a deficient number, since it is larger than the sum of its proper divisors (5739767004).

12913367769 is an frugal number, since it uses more digits than its factorization.

12913367769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75764 (or 37882 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The spelling of 12913367769 in words is "twelve billion, nine hundred thirteen million, three hundred sixty-seven thousand, seven hundred sixty-nine".