13423431 has 8 divisors (see below), whose sum is σ = 20454784. Its totient is φ = 7670520.

The previous prime is 13423411. The next prime is 13423451. The reversal of 13423431 is 13432431.

It is an interprime number because it is at equal distance from previous prime (13423411) and next prime (13423451).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13423431 - 2¹³ = 13415239 is a prime.

It is a super-2 number, since 2×13423431² = 360376999623522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 639211 = 13423431 / (1 + 3 + 4 + 2 + 3 + 4 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 13423398 and 13423407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13423411) 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 7 ways as a sum of consecutive naturals, for example, 319585 + ... + 319626.

It is an arithmetic number, because the mean of its divisors is an integer number (2556848).

Almost surely, 2^13423431 is an apocalyptic number.

13423431 is a deficient number, since it is larger than the sum of its proper divisors (7031353).

13423431 is an equidigital number, since it uses as much as digits as its factorization.

13423431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639221.

The product of its digits is 864, while the sum is 21.

The square root of 13423431 is about 3663.8000764234. The cubic root of 13423431 is about 237.6591347160.

Adding to 13423431 its reverse (13432431), we get a palindrome (26855862).

The spelling of 13423431 in words is "thirteen million, four hundred twenty-three thousand, four hundred thirty-one".