276899981 has 2 divisors, whose sum is σ = 276899982. Its totient is φ = 276899980.

The previous prime is 276899969. The next prime is 276899993. The reversal of 276899981 is 189998672.

It is a balanced prime because it is at equal distance from previous prime (276899969) and next prime (276899993).

It can be written as a sum of positive squares in only one way, i.e., 264712900 + 12187081 = 16270^2 + 3491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-276899981 is a prime.

It is a super-2 number, since 2×276899981² = 153347198955600722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 276899981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276899911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138449990 + 138449991.

It is an arithmetic number, because the mean of its divisors is an integer number (138449991).

Almost surely, 2^276899981 is an apocalyptic number.

It is an amenable number.

276899981 is a deficient number, since it is larger than the sum of its proper divisors (1).

276899981 is an equidigital number, since it uses as much as digits as its factorization.

276899981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 59.

The square root of 276899981 is about 16640.3119261629. The cubic root of 276899981 is about 651.7899233181.

The spelling of 276899981 in words is "two hundred seventy-six million, eight hundred ninety-nine thousand, nine hundred eighty-one".