1213337869 has 2 divisors, whose sum is σ = 1213337870. Its totient is φ = 1213337868.

The previous prime is 1213337831. The next prime is 1213337903. The reversal of 1213337869 is 9687333121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1199721769 + 13616100 = 34637^2 + 3690^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213337869 - 2⁹ = 1213337357 is a prime.

It is a super-2 number, since 2×1213337869² = 2944377568698922322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213337809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606668934 + 606668935.

It is an arithmetic number, because the mean of its divisors is an integer number (606668935).

Almost surely, 2^1213337869 is an apocalyptic number.

It is an amenable number.

1213337869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213337869 is an equidigital number, since it uses as much as digits as its factorization.

1213337869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 1213337869 is about 34832.9997129159. Note that the first 3 decimals coincide. The cubic root of 1213337869 is about 1066.5811830692.

The spelling of 1213337869 in words is "one billion, two hundred thirteen million, three hundred thirty-seven thousand, eight hundred sixty-nine".