13405934623 has 2 divisors, whose sum is σ = 13405934624. Its totient is φ = 13405934622.

The previous prime is 13405934621. The next prime is 13405934657. The reversal of 13405934623 is 32643950431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13405934623 - 2¹ = 13405934621 is a prime.

Together with 13405934621, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13405934621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702967311 + 6702967312.

It is an arithmetic number, because the mean of its divisors is an integer number (6702967312).

Almost surely, 2^13405934623 is an apocalyptic number.

13405934623 is a deficient number, since it is larger than the sum of its proper divisors (1).

13405934623 is an equidigital number, since it uses as much as digits as its factorization.

13405934623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 40.

The spelling of 13405934623 in words is "thirteen billion, four hundred five million, nine hundred thirty-four thousand, six hundred twenty-three".