275840681 has 2 divisors, whose sum is σ = 275840682. Its totient is φ = 275840680.

The previous prime is 275840671. The next prime is 275840683. The reversal of 275840681 is 186048572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207216025 + 68624656 = 14395^2 + 8284^2 .

It is a cyclic number.

It is not a de Polignac number, because 275840681 - 2²² = 271646377 is a prime.

It is a super-2 number, since 2×275840681² = 152176162589087522, which contains 22 as substring.

Together with 275840683, 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 (275840683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137920340 + 137920341.

It is an arithmetic number, because the mean of its divisors is an integer number (137920341).

Almost surely, 2^275840681 is an apocalyptic number.

It is an amenable number.

275840681 is a deficient number, since it is larger than the sum of its proper divisors (1).

275840681 is an equidigital number, since it uses as much as digits as its factorization.

275840681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 275840681 is about 16608.4520952436. The cubic root of 275840681 is about 650.9577053904.

The spelling of 275840681 in words is "two hundred seventy-five million, eight hundred forty thousand, six hundred eighty-one".