13849989091 has 2 divisors, whose sum is σ = 13849989092. Its totient is φ = 13849989090.

The previous prime is 13849989079. The next prime is 13849989151. The reversal of 13849989091 is 19098994831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13849989091 - 2⁷ = 13849988963 is a prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (13849981091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6924994545 + 6924994546.

It is an arithmetic number, because the mean of its divisors is an integer number (6924994546).

Almost surely, 2^13849989091 is an apocalyptic number.

13849989091 is a deficient number, since it is larger than the sum of its proper divisors (1).

13849989091 is an equidigital number, since it uses as much as digits as its factorization.

13849989091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 61.

The spelling of 13849989091 in words is "thirteen billion, eight hundred forty-nine million, nine hundred eighty-nine thousand, ninety-one".