13923591091 has 2 divisors, whose sum is σ = 13923591092. Its totient is φ = 13923591090.

The previous prime is 13923591079. The next prime is 13923591127. The reversal of 13923591091 is 19019532931.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13923591091 - 2⁹ = 13923590579 is a prime.

It is not a weakly prime, because it can be changed into another prime (13923591691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6961795545 + 6961795546.

It is an arithmetic number, because the mean of its divisors is an integer number (6961795546).

Almost surely, 2^13923591091 is an apocalyptic number.

13923591091 is a deficient number, since it is larger than the sum of its proper divisors (1).

13923591091 is an equidigital number, since it uses as much as digits as its factorization.

13923591091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 43.

The spelling of 13923591091 in words is "thirteen billion, nine hundred twenty-three million, five hundred ninety-one thousand, ninety-one".