12491294737 has 2 divisors, whose sum is σ = 12491294738. Its totient is φ = 12491294736.

The previous prime is 12491294701. The next prime is 12491294743. The reversal of 12491294737 is 73749219421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12491191696 + 103041 = 111764^2 + 321^2 .

It is a cyclic number.

It is not a de Polignac number, because 12491294737 - 2²³ = 12482906129 is a prime.

It is not a weakly prime, because it can be changed into another prime (12491294797) 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 as a sum of consecutive naturals, namely, 6245647368 + 6245647369.

It is an arithmetic number, because the mean of its divisors is an integer number (6245647369).

Almost surely, 2^12491294737 is an apocalyptic number.

It is an amenable number.

12491294737 is a deficient number, since it is larger than the sum of its proper divisors (1).

12491294737 is an equidigital number, since it uses as much as digits as its factorization.

12491294737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 49.

The spelling of 12491294737 in words is "twelve billion, four hundred ninety-one million, two hundred ninety-four thousand, seven hundred thirty-seven".