13405923 has 12 divisors (see below), whose sum is σ = 19546488. Its totient is φ = 8853120.

The previous prime is 13405913. The next prime is 13405927. The reversal of 13405923 is 32950431.

It is not a de Polignac number, because 13405923 - 2⁹ = 13405411 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (13405927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5998 + ... + 7923.

It is an arithmetic number, because the mean of its divisors is an integer number (1628874).

Almost surely, 2^13405923 is an apocalyptic number.

13405923 is a deficient number, since it is larger than the sum of its proper divisors (6140565).

13405923 is a wasteful number, since it uses less digits than its factorization.

13405923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14034 (or 14031 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 13405923 is about 3661.4099743132. The cubic root of 13405923 is about 237.5557645602. Note that the first 3 decimals are identical.

The spelling of 13405923 in words is "thirteen million, four hundred five thousand, nine hundred twenty-three".