13290731 has 2 divisors, whose sum is σ = 13290732. Its totient is φ = 13290730.

The previous prime is 13290713. The next prime is 13290751. The reversal of 13290731 is 13709231.

13290731 is nontrivially palindromic in base 5.

Together with previous prime (13290713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13290731 is a prime.

It is a super-2 number, since 2×13290731² = 353287061028722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13290731.

It is not a weakly prime, because it can be changed into another prime (13290751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6645365 + 6645366.

It is an arithmetic number, because the mean of its divisors is an integer number (6645366).

Almost surely, 2^13290731 is an apocalyptic number.

13290731 is a deficient number, since it is larger than the sum of its proper divisors (1).

13290731 is an equidigital number, since it uses as much as digits as its factorization.

13290731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 26.

The square root of 13290731 is about 3645.6454846844. The cubic root of 13290731 is about 236.8733975799.

Adding to 13290731 its reverse (13709231), we get a palindrome (26999962).

The spelling of 13290731 in words is "thirteen million, two hundred ninety thousand, seven hundred thirty-one".