275249969 has 2 divisors, whose sum is σ = 275249970. Its totient is φ = 275249968.

The previous prime is 275249963. The next prime is 275249971. The reversal of 275249969 is 969942572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271590400 + 3659569 = 16480^2 + 1913^2 .

It is a cyclic number.

It is not a de Polignac number, because 275249969 - 2¹⁶ = 275184433 is a prime.

It is a super-2 number, since 2×275249969² = 151525090869001922, which contains 22 as substring.

Together with 275249971, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 275249969.

It is not a weakly prime, because it can be changed into another prime (275249963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137624984 + 137624985.

It is an arithmetic number, because the mean of its divisors is an integer number (137624985).

Almost surely, 2^275249969 is an apocalyptic number.

It is an amenable number.

275249969 is a deficient number, since it is larger than the sum of its proper divisors (1).

275249969 is an equidigital number, since it uses as much as digits as its factorization.

275249969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 53.

The square root of 275249969 is about 16590.6590887764. The cubic root of 275249969 is about 650.4926986305.

The spelling of 275249969 in words is "two hundred seventy-five million, two hundred forty-nine thousand, nine hundred sixty-nine".