276730889 has 2 divisors, whose sum is σ = 276730890. Its totient is φ = 276730888.

The previous prime is 276730829. The next prime is 276730891. The reversal of 276730889 is 988037672.

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., 220225600 + 56505289 = 14840^2 + 7517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-276730889 is a prime.

Together with 276730891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (276730829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138365444 + 138365445.

It is an arithmetic number, because the mean of its divisors is an integer number (138365445).

Almost surely, 2^276730889 is an apocalyptic number.

It is an amenable number.

276730889 is a deficient number, since it is larger than the sum of its proper divisors (1).

276730889 is an equidigital number, since it uses as much as digits as its factorization.

276730889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 276730889 is about 16635.2303560846. The cubic root of 276730889 is about 651.6572220890.

The spelling of 276730889 in words is "two hundred seventy-six million, seven hundred thirty thousand, eight hundred eighty-nine".