275812961 has 2 divisors, whose sum is σ = 275812962. Its totient is φ = 275812960.

The previous prime is 275812951. The next prime is 275812973. The reversal of 275812961 is 169218572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264550225 + 11262736 = 16265^2 + 3356^2 .

It is a cyclic number.

It is not a de Polignac number, because 275812961 - 2⁶ = 275812897 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (275812951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137906480 + 137906481.

It is an arithmetic number, because the mean of its divisors is an integer number (137906481).

Almost surely, 2^275812961 is an apocalyptic number.

It is an amenable number.

275812961 is a deficient number, since it is larger than the sum of its proper divisors (1).

275812961 is an equidigital number, since it uses as much as digits as its factorization.

275812961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 275812961 is about 16607.6175594213. The cubic root of 275812961 is about 650.9358991410.

The spelling of 275812961 in words is "two hundred seventy-five million, eight hundred twelve thousand, nine hundred sixty-one".