276745905 has 12 divisors (see below), whose sum is σ = 479692980. Its totient is φ = 147597792.

The previous prime is 276745901. The next prime is 276745919. The reversal of 276745905 is 509547672.

It can be written as a sum of positive squares in 2 ways, for example, as 76580001 + 200165904 = 8751^2 + 14148^2 .

It is not a de Polignac number, because 276745905 - 2² = 276745901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 6149909 = 276745905 / (2 + 7 + 6 + 7 + 4 + 5 + 9 + 0 + 5).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (276745901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3074910 + ... + 3074999.

It is an arithmetic number, because the mean of its divisors is an integer number (39974415).

Almost surely, 2^276745905 is an apocalyptic number.

It is an amenable number.

276745905 is a deficient number, since it is larger than the sum of its proper divisors (202947075).

276745905 is a wasteful number, since it uses less digits than its factorization.

276745905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6149920 (or 6149917 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The square root of 276745905 is about 16635.6816812537. The cubic root of 276745905 is about 651.6690086396.

The spelling of 276745905 in words is "two hundred seventy-six million, seven hundred forty-five thousand, nine hundred five".