275696991 has 24 divisors (see below), whose sum is σ = 404099280. Its totient is φ = 181104000.

The previous prime is 275696987. The next prime is 275696999. The reversal of 275696991 is 199696572.

It is not a de Polignac number, because 275696991 - 2² = 275696987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275696999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 392941 + ... + 393641.

It is an arithmetic number, because the mean of its divisors is an integer number (16837470).

Almost surely, 2^275696991 is an apocalyptic number.

275696991 is a deficient number, since it is larger than the sum of its proper divisors (128402289).

275696991 is a wasteful number, since it uses less digits than its factorization.

275696991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1287 (or 1284 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 275696991 is about 16604.1257222414. The cubic root of 275696991 is about 650.8446541917.

The spelling of 275696991 in words is "two hundred seventy-five million, six hundred ninety-six thousand, nine hundred ninety-one".