13195972789 has 2 divisors, whose sum is σ = 13195972790. Its totient is φ = 13195972788.

The previous prime is 13195972759. The next prime is 13195972793. The reversal of 13195972789 is 98727959131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12718200625 + 477772164 = 112775^2 + 21858^2 .

It is a cyclic number.

It is not a de Polignac number, because 13195972789 - 2⁷ = 13195972661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13195972729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6597986394 + 6597986395.

It is an arithmetic number, because the mean of its divisors is an integer number (6597986395).

Almost surely, 2^13195972789 is an apocalyptic number.

It is an amenable number.

13195972789 is a deficient number, since it is larger than the sum of its proper divisors (1).

13195972789 is an equidigital number, since it uses as much as digits as its factorization.

13195972789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 61.

The spelling of 13195972789 in words is "thirteen billion, one hundred ninety-five million, nine hundred seventy-two thousand, seven hundred eighty-nine".