1097707649 has 2 divisors, whose sum is σ = 1097707650. Its totient is φ = 1097707648.

The previous prime is 1097707579. The next prime is 1097707657. The reversal of 1097707649 is 9467077901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1072104049 + 25603600 = 32743^2 + 5060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1097707649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1097707597 and 1097707606.

It is not a weakly prime, because it can be changed into another prime (1097707669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548853824 + 548853825.

It is an arithmetic number, because the mean of its divisors is an integer number (548853825).

Almost surely, 2^1097707649 is an apocalyptic number.

It is an amenable number.

1097707649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097707649 is an equidigital number, since it uses as much as digits as its factorization.

1097707649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 50.

The square root of 1097707649 is about 33131.6713885672. The cubic root of 1097707649 is about 1031.5625415022.

The spelling of 1097707649 in words is "one billion, ninety-seven million, seven hundred seven thousand, six hundred forty-nine".