13543239923 has 2 divisors, whose sum is σ = 13543239924. Its totient is φ = 13543239922.

The previous prime is 13543239889. The next prime is 13543239929. The reversal of 13543239923 is 32993234531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13543239923 - 2⁸ = 13543239667 is a prime.

It is a super-2 number, since 2×13543239923² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13543239929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6771619961 + 6771619962.

It is an arithmetic number, because the mean of its divisors is an integer number (6771619962).

Almost surely, 2^13543239923 is an apocalyptic number.

13543239923 is a deficient number, since it is larger than the sum of its proper divisors (1).

13543239923 is an equidigital number, since it uses as much as digits as its factorization.

13543239923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 44.

The spelling of 13543239923 in words is "thirteen billion, five hundred forty-three million, two hundred thirty-nine thousand, nine hundred twenty-three".