9123496861 has 2 divisors, whose sum is σ = 9123496862. Its totient is φ = 9123496860.

The previous prime is 9123496849. The next prime is 9123496873. The reversal of 9123496861 is 1686943219.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (9123496849) and next prime (9123496873).

It can be written as a sum of positive squares in only one way, i.e., 7024116100 + 2099380761 = 83810^2 + 45819^2 .

It is a cyclic number.

It is not a de Polignac number, because 9123496861 - 2¹³ = 9123488669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9123496841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4561748430 + 4561748431.

It is an arithmetic number, because the mean of its divisors is an integer number (4561748431).

Almost surely, 2^9123496861 is an apocalyptic number.

9123496861 is the 42717-th centered decagonal number.

It is an amenable number.

9123496861 is a deficient number, since it is larger than the sum of its proper divisors (1).

9123496861 is an equidigital number, since it uses as much as digits as its factorization.

9123496861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 49.

The square root of 9123496861 is about 95516.9977595611. The cubic root of 9123496861 is about 2089.5548498305.

The spelling of 9123496861 in words is "nine billion, one hundred twenty-three million, four hundred ninety-six thousand, eight hundred sixty-one".