13490331 has 4 divisors (see below), whose sum is σ = 17987112. Its totient is φ = 8993552.

The previous prime is 13490329. The next prime is 13490339. The reversal of 13490331 is 13309431.

13490331 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13309431 = 3 ⋅4436477.

It is a cyclic number.

It is not a de Polignac number, because 13490331 - 2¹ = 13490329 is a prime.

It is a super-2 number, since 2×13490331² = 363978060979122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13490339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2248386 + ... + 2248391.

It is an arithmetic number, because the mean of its divisors is an integer number (4496778).

Almost surely, 2^13490331 is an apocalyptic number.

13490331 is a deficient number, since it is larger than the sum of its proper divisors (4496781).

13490331 is an equidigital number, since it uses as much as digits as its factorization.

13490331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4496780.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 13490331 is about 3672.9185942517. The cubic root of 13490331 is about 238.0532976228.

Adding to 13490331 its reverse (13309431), we get a palindrome (26799762).

The spelling of 13490331 in words is "thirteen million, four hundred ninety thousand, three hundred thirty-one".