1211823673 has 2 divisors, whose sum is σ = 1211823674. Its totient is φ = 1211823672.

The previous prime is 1211823623. The next prime is 1211823719. The reversal of 1211823673 is 3763281121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1164379129 + 47444544 = 34123^2 + 6888^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211823673 - 2⁹ = 1211823161 is a prime.

It is a super-2 number, since 2×1211823673² = 2937033228886421858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1211823623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605911836 + 605911837.

It is an arithmetic number, because the mean of its divisors is an integer number (605911837).

Almost surely, 2^1211823673 is an apocalyptic number.

It is an amenable number.

1211823673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211823673 is an equidigital number, since it uses as much as digits as its factorization.

1211823673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 1211823673 is about 34811.2578485754. The cubic root of 1211823673 is about 1066.1373151541.

The spelling of 1211823673 in words is "one billion, two hundred eleven million, eight hundred twenty-three thousand, six hundred seventy-three".