12961692309 has 8 divisors (see below), whose sum is σ = 17283499072. Its totient is φ = 8640506880.

The previous prime is 12961692307. The next prime is 12961692329. The reversal of 12961692309 is 90329616921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12961692309 - 2¹ = 12961692307 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12961692307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104257 + ... + 191814.

It is an arithmetic number, because the mean of its divisors is an integer number (2160437384).

Almost surely, 2^12961692309 is an apocalyptic number.

It is an amenable number.

12961692309 is a deficient number, since it is larger than the sum of its proper divisors (4321806763).

12961692309 is a wasteful number, since it uses less digits than its factorization.

12961692309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310667.

The product of its (nonzero) digits is 314928, while the sum is 48.

The spelling of 12961692309 in words is "twelve billion, nine hundred sixty-one million, six hundred ninety-two thousand, three hundred nine".