13309031 has 2 divisors, whose sum is σ = 13309032. Its totient is φ = 13309030.

The previous prime is 13309007. The next prime is 13309061. The reversal of 13309031 is 13090331.

13309031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (13090331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13309031 is a prime.

It is a super-2 number, since 2×13309031² = 354260612317922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13308994 and 13309012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13309001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6654515 + 6654516.

It is an arithmetic number, because the mean of its divisors is an integer number (6654516).

Almost surely, 2^13309031 is an apocalyptic number.

13309031 is a deficient number, since it is larger than the sum of its proper divisors (1).

13309031 is an equidigital number, since it uses as much as digits as its factorization.

13309031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 20.

The square root of 13309031 is about 3648.1544649315. The cubic root of 13309031 is about 236.9820646697.

Adding to 13309031 its reverse (13090331), we get a palindrome (26399362).

The spelling of 13309031 in words is "thirteen million, three hundred nine thousand, thirty-one".