276849389 has 2 divisors, whose sum is σ = 276849390. Its totient is φ = 276849388.

The previous prime is 276849379. The next prime is 276849407. The reversal of 276849389 is 983948672.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259693225 + 17156164 = 16115^2 + 4142^2 .

It is a cyclic number.

It is not a de Polignac number, because 276849389 - 2⁴ = 276849373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (276849329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 138424694 + 138424695.

It is an arithmetic number, because the mean of its divisors is an integer number (138424695).

Almost surely, 2^276849389 is an apocalyptic number.

It is an amenable number.

276849389 is a deficient number, since it is larger than the sum of its proper divisors (1).

276849389 is an equidigital number, since it uses as much as digits as its factorization.

276849389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 56.

The square root of 276849389 is about 16638.7916929085. The cubic root of 276849389 is about 651.7502250317.

It can be divided in two parts, 27684 and 9389, that added together give a palindrome (37073).

The spelling of 276849389 in words is "two hundred seventy-six million, eight hundred forty-nine thousand, three hundred eighty-nine".