9812249761 has 2 divisors, whose sum is σ = 9812249762. Its totient is φ = 9812249760.

The previous prime is 9812249749. The next prime is 9812249767. The reversal of 9812249761 is 1679422189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6717441600 + 3094808161 = 81960^2 + 55631^2 .

It is a cyclic number.

It is not a de Polignac number, because 9812249761 - 2¹⁵ = 9812216993 is a prime.

It is not a weakly prime, because it can be changed into another prime (9812249767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4906124880 + 4906124881.

It is an arithmetic number, because the mean of its divisors is an integer number (4906124881).

Almost surely, 2^9812249761 is an apocalyptic number.

It is an amenable number.

9812249761 is a deficient number, since it is larger than the sum of its proper divisors (1).

9812249761 is an equidigital number, since it uses as much as digits as its factorization.

9812249761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 9812249761 is about 99056.8006802158. The cubic root of 9812249761 is about 2140.8662287164.

The spelling of 9812249761 in words is "nine billion, eight hundred twelve million, two hundred forty-nine thousand, seven hundred sixty-one".