13916405 has 4 divisors (see below), whose sum is σ = 16699692. Its totient is φ = 11133120.

The previous prime is 13916401. The next prime is 13916411. The reversal of 13916405 is 50461931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1540081 + 12376324 = 1241^2 + 3518^2 .

It is not a de Polignac number, because 13916405 - 2² = 13916401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13916401) 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 3 ways as a sum of consecutive naturals, for example, 1391636 + ... + 1391645.

It is an arithmetic number, because the mean of its divisors is an integer number (4174923).

Almost surely, 2^13916405 is an apocalyptic number.

It is an amenable number.

13916405 is a deficient number, since it is larger than the sum of its proper divisors (2783287).

13916405 is an equidigital number, since it uses as much as digits as its factorization.

13916405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783286.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 13916405 is about 3730.4698095548. The cubic root of 13916405 is about 240.5335640675.

The spelling of 13916405 in words is "thirteen million, nine hundred sixteen thousand, four hundred five".