274906921 has 6 divisors (see below), whose sum is σ = 284714222. Its totient is φ = 265426560.

The previous prime is 274906823. The next prime is 274906939. The reversal of 274906921 is 129609472.

It can be written as a sum of positive squares in 3 ways, for example, as 87216921 + 187690000 = 9339^2 + 13700^2 .

It is not a de Polignac number, because 274906921 - 2⁹ = 274906409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (274906721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162600 + ... + 164281.

Almost surely, 2^274906921 is an apocalyptic number.

It is an amenable number.

274906921 is a deficient number, since it is larger than the sum of its proper divisors (9807301).

274906921 is an equidigital number, since it uses as much as digits as its factorization.

274906921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326939 (or 326910 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 274906921 is about 16580.3172768195. The cubic root of 274906921 is about 650.2223468124. Note that the first 3 decimals are identical.

The spelling of 274906921 in words is "two hundred seventy-four million, nine hundred six thousand, nine hundred twenty-one".