13091874977 has 4 divisors (see below), whose sum is σ = 13338891540. Its totient is φ = 12844858416.

The previous prime is 13091874967. The next prime is 13091874979. The reversal of 13091874977 is 77947819031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9698113441 + 3393761536 = 98479^2 + 58256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13091874977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13091874979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123508202 + ... + 123508307.

It is an arithmetic number, because the mean of its divisors is an integer number (3334722885).

Almost surely, 2^13091874977 is an apocalyptic number.

It is an amenable number.

13091874977 is a deficient number, since it is larger than the sum of its proper divisors (247016563).

13091874977 is an equidigital number, since it uses as much as digits as its factorization.

13091874977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247016562.

The product of its (nonzero) digits is 2667168, while the sum is 56.

The spelling of 13091874977 in words is "thirteen billion, ninety-one million, eight hundred seventy-four thousand, nine hundred seventy-seven".