12618731 has 2 divisors, whose sum is σ = 12618732. Its totient is φ = 12618730.

The previous prime is 12618721. The next prime is 12618751. The reversal of 12618731 is 13781621.

12618731 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 a cyclic number.

It is not a de Polignac number, because 12618731 - 2⁶ = 12618667 is a prime.

It is a super-2 number, since 2×12618731² = 318464744100722, 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 = 12618694 and 12618703.

It is not a weakly prime, because it can be changed into another prime (12618721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6309365 + 6309366.

It is an arithmetic number, because the mean of its divisors is an integer number (6309366).

Almost surely, 2^12618731 is an apocalyptic number.

12618731 is a deficient number, since it is larger than the sum of its proper divisors (1).

12618731 is an equidigital number, since it uses as much as digits as its factorization.

12618731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 12618731 is about 3552.2853207478. The cubic root of 12618731 is about 232.8119280289.

The spelling of 12618731 in words is "twelve million, six hundred eighteen thousand, seven hundred thirty-one".