1272708889 has 2 divisors, whose sum is σ = 1272708890. Its totient is φ = 1272708888.

The previous prime is 1272708823. The next prime is 1272708917. The reversal of 1272708889 is 9888072721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1252593664 + 20115225 = 35392^2 + 4485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272708889 - 2²⁷ = 1138491161 is a prime.

It is a super-2 number, since 2×1272708889² = 3239575832279228642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1272708809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636354444 + 636354445.

It is an arithmetic number, because the mean of its divisors is an integer number (636354445).

Almost surely, 2^1272708889 is an apocalyptic number.

It is an amenable number.

1272708889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272708889 is an equidigital number, since it uses as much as digits as its factorization.

1272708889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 52.

The square root of 1272708889 is about 35675.0457462916. The cubic root of 1272708889 is about 1083.7015448209.

The spelling of 1272708889 in words is "one billion, two hundred seventy-two million, seven hundred eight thousand, eight hundred eighty-nine".