274430891 has 4 divisors (see below), whose sum is σ = 313635312. Its totient is φ = 235226472.

The previous prime is 274430867. The next prime is 274430899. The reversal of 274430891 is 198034472.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-274430891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (274430899) 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 3 ways as a sum of consecutive naturals, for example, 19602200 + ... + 19602213.

It is an arithmetic number, because the mean of its divisors is an integer number (78408828).

Almost surely, 2^274430891 is an apocalyptic number.

274430891 is a deficient number, since it is larger than the sum of its proper divisors (39204421).

274430891 is an equidigital number, since it uses as much as digits as its factorization.

274430891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39204420.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 274430891 is about 16565.9557828699. The cubic root of 274430891 is about 649.8468207093.

The spelling of 274430891 in words is "two hundred seventy-four million, four hundred thirty thousand, eight hundred ninety-one".