13406431 has 4 divisors (see below), whose sum is σ = 13474000. Its totient is φ = 13338864.

The previous prime is 13406429. The next prime is 13406443. The reversal of 13406431 is 13460431.

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

It is a cyclic number.

It is not a de Polignac number, because 13406431 - 2¹ = 13406429 is a prime.

It is a super-2 number, since 2×13406431² = 359464784315522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13406461) 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, 33486 + ... + 33883.

It is an arithmetic number, because the mean of its divisors is an integer number (3368500).

Almost surely, 2^13406431 is an apocalyptic number.

13406431 is a deficient number, since it is larger than the sum of its proper divisors (67569).

13406431 is an equidigital number, since it uses as much as digits as its factorization.

13406431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67568.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 13406431 is about 3661.4793458382. The cubic root of 13406431 is about 237.5587651445.

Adding to 13406431 its reverse (13460431), we get a palindrome (26866862).

The spelling of 13406431 in words is "thirteen million, four hundred six thousand, four hundred thirty-one".