1272832889 has 2 divisors, whose sum is σ = 1272832890. Its totient is φ = 1272832888.

The previous prime is 1272832861. The next prime is 1272832909. The reversal of 1272832889 is 9882382721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1237632400 + 35200489 = 35180^2 + 5933^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272832889 - 2¹² = 1272828793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1272832829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636416444 + 636416445.

It is an arithmetic number, because the mean of its divisors is an integer number (636416445).

Almost surely, 2^1272832889 is an apocalyptic number.

It is an amenable number.

1272832889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272832889 is an equidigital number, since it uses as much as digits as its factorization.

1272832889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 50.

The square root of 1272832889 is about 35676.7836134369. The cubic root of 1272832889 is about 1083.7367386841.

It can be divided in two parts, 1272832 and 889, that added together give a palindrome (1273721).

The spelling of 1272832889 in words is "one billion, two hundred seventy-two million, eight hundred thirty-two thousand, eight hundred eighty-nine".