274856991 has 4 divisors (see below), whose sum is σ = 366475992. Its totient is φ = 183237992.

The previous prime is 274856977. The next prime is 274857001. The reversal of 274856991 is 199658472.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 274856991 - 2¹⁰ = 274855967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274856951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45809496 + ... + 45809501.

It is an arithmetic number, because the mean of its divisors is an integer number (91618998).

Almost surely, 2^274856991 is an apocalyptic number.

274856991 is a deficient number, since it is larger than the sum of its proper divisors (91619001).

274856991 is an equidigital number, since it uses as much as digits as its factorization.

274856991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91619000.

The product of its digits is 1088640, while the sum is 51.

The square root of 274856991 is about 16578.8115074634. The cubic root of 274856991 is about 650.1829788603.

The spelling of 274856991 in words is "two hundred seventy-four million, eight hundred fifty-six thousand, nine hundred ninety-one".