13531343393 has 2 divisors, whose sum is σ = 13531343394. Its totient is φ = 13531343392.

The previous prime is 13531343389. The next prime is 13531343431. The reversal of 13531343393 is 39334313531.

It is an a-pointer prime, because the next prime (13531343431) can be obtained adding 13531343393 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13413577489 + 117765904 = 115817^2 + 10852^2 .

It is a cyclic number.

It is not a de Polignac number, because 13531343393 - 2² = 13531343389 is a prime.

It is not a weakly prime, because it can be changed into another prime (13531343303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765671696 + 6765671697.

It is an arithmetic number, because the mean of its divisors is an integer number (6765671697).

Almost surely, 2^13531343393 is an apocalyptic number.

It is an amenable number.

13531343393 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531343393 is an equidigital number, since it uses as much as digits as its factorization.

13531343393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 38.

The spelling of 13531343393 in words is "thirteen billion, five hundred thirty-one million, three hundred forty-three thousand, three hundred ninety-three".