13193725861 has 2 divisors, whose sum is σ = 13193725862. Its totient is φ = 13193725860.

The previous prime is 13193725813. The next prime is 13193725873. The reversal of 13193725861 is 16852739131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13153796100 + 39929761 = 114690^2 + 6319^2 .

It is an emirp because it is prime and its reverse (16852739131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13193725861 - 2³¹ = 11046242213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13193725801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6596862930 + 6596862931.

It is an arithmetic number, because the mean of its divisors is an integer number (6596862931).

Almost surely, 2^13193725861 is an apocalyptic number.

It is an amenable number.

13193725861 is a deficient number, since it is larger than the sum of its proper divisors (1).

13193725861 is an equidigital number, since it uses as much as digits as its factorization.

13193725861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The spelling of 13193725861 in words is "thirteen billion, one hundred ninety-three million, seven hundred twenty-five thousand, eight hundred sixty-one".