275680391 has 8 divisors (see below), whose sum is σ = 320403840. Its totient is φ = 232292088.

The previous prime is 275680387. The next prime is 275680393. The reversal of 275680391 is 193086572.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 275680391 - 2² = 275680387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275680393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333341 + ... + 334166.

It is an arithmetic number, because the mean of its divisors is an integer number (40050480).

Almost surely, 2^275680391 is an apocalyptic number.

275680391 is a deficient number, since it is larger than the sum of its proper divisors (44723449).

275680391 is an equidigital number, since it uses as much as digits as its factorization.

275680391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667573.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 275680391 is about 16603.6258389546. The cubic root of 275680391 is about 650.8315912537.

The spelling of 275680391 in words is "two hundred seventy-five million, six hundred eighty thousand, three hundred ninety-one".