1218119597 has 2 divisors, whose sum is σ = 1218119598. Its totient is φ = 1218119596.

The previous prime is 1218119561. The next prime is 1218119603. The reversal of 1218119597 is 7959118121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 766514596 + 451605001 = 27686^2 + 21251^2 .

It is a cyclic number.

It is not a de Polignac number, because 1218119597 - 2¹⁴ = 1218103213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218119527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609059798 + 609059799.

It is an arithmetic number, because the mean of its divisors is an integer number (609059799).

Almost surely, 2^1218119597 is an apocalyptic number.

It is an amenable number.

1218119597 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218119597 is an equidigital number, since it uses as much as digits as its factorization.

1218119597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 44.

The square root of 1218119597 is about 34901.5701222739. The cubic root of 1218119597 is about 1067.9804679362.

The spelling of 1218119597 in words is "one billion, two hundred eighteen million, one hundred nineteen thousand, five hundred ninety-seven".