1211164393 has 2 divisors, whose sum is σ = 1211164394. Its totient is φ = 1211164392.

The previous prime is 1211164379. The next prime is 1211164399. The reversal of 1211164393 is 3934611121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1169845209 + 41319184 = 34203^2 + 6428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211164393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211164399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605582196 + 605582197.

It is an arithmetic number, because the mean of its divisors is an integer number (605582197).

Almost surely, 2^1211164393 is an apocalyptic number.

It is an amenable number.

1211164393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211164393 is an equidigital number, since it uses as much as digits as its factorization.

1211164393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 31.

The square root of 1211164393 is about 34801.7872098546. The cubic root of 1211164393 is about 1065.9439397952.

The spelling of 1211164393 in words is "one billion, two hundred eleven million, one hundred sixty-four thousand, three hundred ninety-three".