274742209 has 4 divisors (see below), whose sum is σ = 313991104. Its totient is φ = 235493316.

The previous prime is 274742207. The next prime is 274742227. The reversal of 274742209 is 902247472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 274742209 - 2¹ = 274742207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (274742203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19624437 + ... + 19624450.

It is an arithmetic number, because the mean of its divisors is an integer number (78497776).

Almost surely, 2^274742209 is an apocalyptic number.

It is an amenable number.

274742209 is a deficient number, since it is larger than the sum of its proper divisors (39248895).

274742209 is an equidigital number, since it uses as much as digits as its factorization.

274742209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39248894.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 274742209 is about 16575.3494382471. The cubic root of 274742209 is about 650.0924594313.

The spelling of 274742209 in words is "two hundred seventy-four million, seven hundred forty-two thousand, two hundred nine".