1097118389 has 2 divisors, whose sum is σ = 1097118390. Its totient is φ = 1097118388.

The previous prime is 1097118371. The next prime is 1097118419. The reversal of 1097118389 is 9838117901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 736688164 + 360430225 = 27142^2 + 18985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1097118389 - 2²⁴ = 1080341173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1097118359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548559194 + 548559195.

It is an arithmetic number, because the mean of its divisors is an integer number (548559195).

Almost surely, 2^1097118389 is an apocalyptic number.

It is an amenable number.

1097118389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097118389 is an equidigital number, since it uses as much as digits as its factorization.

1097118389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 47.

The square root of 1097118389 is about 33122.7774952524. Note that the first 3 decimals coincide. The cubic root of 1097118389 is about 1031.3779242396.

The spelling of 1097118389 in words is "one billion, ninety-seven million, one hundred eighteen thousand, three hundred eighty-nine".