1097446661 has 2 divisors, whose sum is σ = 1097446662. Its totient is φ = 1097446660.

The previous prime is 1097446657. The next prime is 1097446697. The reversal of 1097446661 is 1666447901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092633025 + 4813636 = 33055^2 + 2194^2 .

It is an emirp because it is prime and its reverse (1666447901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1097446661 - 2² = 1097446657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1097446601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548723330 + 548723331.

It is an arithmetic number, because the mean of its divisors is an integer number (548723331).

Almost surely, 2^1097446661 is an apocalyptic number.

It is an amenable number.

1097446661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097446661 is an equidigital number, since it uses as much as digits as its factorization.

1097446661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 1097446661 is about 33127.7325061647. The cubic root of 1097446661 is about 1031.4807811827.

The spelling of 1097446661 in words is "one billion, ninety-seven million, four hundred forty-six thousand, six hundred sixty-one".