13247635399 has 2 divisors, whose sum is σ = 13247635400. Its totient is φ = 13247635398.

The previous prime is 13247635393. The next prime is 13247635403. The reversal of 13247635399 is 99353674231.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13247635399 - 2³ = 13247635391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13247635391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6623817699 + 6623817700.

It is an arithmetic number, because the mean of its divisors is an integer number (6623817700).

Almost surely, 2^13247635399 is an apocalyptic number.

13247635399 is a deficient number, since it is larger than the sum of its proper divisors (1).

13247635399 is an equidigital number, since it uses as much as digits as its factorization.

13247635399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 52.

The spelling of 13247635399 in words is "thirteen billion, two hundred forty-seven million, six hundred thirty-five thousand, three hundred ninety-nine".