274001809 has 3 divisors (see below), whose sum is σ = 274018363. Its totient is φ = 273985256.

The previous prime is 274001807. The next prime is 274001821. The reversal of 274001809 is 908100472.

The square root of 274001809 is 16553.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 262926225 + 11075584 = 16215^2 + 3328^2 .

It is not a de Polignac number, because 274001809 - 2¹ = 274001807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (274001807) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8277 + ... + 24829.

Almost surely, 2^274001809 is an apocalyptic number.

274001809 is the 16553-rd square number.

274001809 is the 8277-th centered octagonal number.

It is an amenable number.

274001809 is a deficient number, since it is larger than the sum of its proper divisors (16554).

274001809 is an frugal number, since it uses more digits than its factorization.

274001809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33106 (or 16553 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The cubic root of 274001809 is about 649.5079581965.

The spelling of 274001809 in words is "two hundred seventy-four million, one thousand, eight hundred nine".