274849981 has 4 divisors (see below), whose sum is σ = 314114272. Its totient is φ = 235585692.

The previous prime is 274849963. The next prime is 274850003. The reversal of 274849981 is 189948472.

It is a happy number.

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 274849981 - 2⁷ = 274849853 is a prime.

It is a super-2 number, since 2×274849981² = 151085024111400722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (274849951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19632135 + ... + 19632148.

It is an arithmetic number, because the mean of its divisors is an integer number (78528568).

Almost surely, 2^274849981 is an apocalyptic number.

It is an amenable number.

274849981 is a deficient number, since it is larger than the sum of its proper divisors (39264291).

274849981 is an equidigital number, since it uses as much as digits as its factorization.

274849981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39264290.

The product of its digits is 1161216, while the sum is 52.

The square root of 274849981 is about 16578.6000916845. The cubic root of 274849981 is about 650.1774513538.

The spelling of 274849981 in words is "two hundred seventy-four million, eight hundred forty-nine thousand, nine hundred eighty-one".