1213344289 has 2 divisors, whose sum is σ = 1213344290. Its totient is φ = 1213344288.

The previous prime is 1213344271. The next prime is 1213344337. The reversal of 1213344289 is 9824433121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1213337889 + 6400 = 34833^2 + 80^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213344289 - 2⁵ = 1213344257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213344259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606672144 + 606672145.

It is an arithmetic number, because the mean of its divisors is an integer number (606672145).

Almost surely, 2^1213344289 is an apocalyptic number.

It is an amenable number.

1213344289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213344289 is an equidigital number, since it uses as much as digits as its factorization.

1213344289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 1213344289 is about 34833.0918667867. The cubic root of 1213344289 is about 1066.5830642267.

The spelling of 1213344289 in words is "one billion, two hundred thirteen million, three hundred forty-four thousand, two hundred eighty-nine".