9147822661 has 2 divisors, whose sum is σ = 9147822662. Its totient is φ = 9147822660.

The previous prime is 9147822659. The next prime is 9147822701. The reversal of 9147822661 is 1662287419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5140173025 + 4007649636 = 71695^2 + 63306^2 .

It is a cyclic number.

It is not a de Polignac number, because 9147822661 - 2¹ = 9147822659 is a prime.

Together with 9147822659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9147823661) 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, 4573911330 + 4573911331.

It is an arithmetic number, because the mean of its divisors is an integer number (4573911331).

Almost surely, 2^9147822661 is an apocalyptic number.

It is an amenable number.

9147822661 is a deficient number, since it is larger than the sum of its proper divisors (1).

9147822661 is an equidigital number, since it uses as much as digits as its factorization.

9147822661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 9147822661 is about 95644.2505381270. The cubic root of 9147822661 is about 2091.4103147244.

The spelling of 9147822661 in words is "nine billion, one hundred forty-seven million, eight hundred twenty-two thousand, six hundred sixty-one".