13404331 has 6 divisors (see below), whose sum is σ = 14013020. Its totient is φ = 12821028.

The previous prime is 13404319. The next prime is 13404343. The reversal of 13404331 is 13340431.

It is an interprime number because it is at equal distance from previous prime (13404319) and next prime (13404343).

It is not a de Polignac number, because 13404331 - 2⁵ = 13404299 is a prime.

It is a super-3 number, since 3×13404331³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13404299 and 13404308.

It is not an unprimeable number, because it can be changed into a prime (13408331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12141 + ... + 13198.

Almost surely, 2^13404331 is an apocalyptic number.

13404331 is a deficient number, since it is larger than the sum of its proper divisors (608689).

13404331 is an equidigital number, since it uses as much as digits as its factorization.

13404331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25385 (or 25362 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 13404331 is about 3661.1925652716. The cubic root of 13404331 is about 237.5463606634.

Adding to 13404331 its reverse (13340431), we get a palindrome (26744762).

It can be divided in two parts, 1340 and 4331, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 13404331 in words is "thirteen million, four hundred four thousand, three hundred thirty-one".