274440643 has 4 divisors (see below), whose sum is σ = 278536840. Its totient is φ = 270344448.

The previous prime is 274440641. The next prime is 274440671. The reversal of 274440643 is 346044472.

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

It is a cyclic number.

It is not a de Polignac number, because 274440643 - 2¹ = 274440641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 274440599 and 274440608.

It is not an unprimeable number, because it can be changed into a prime (274440641) 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, 2047998 + ... + 2048131.

It is an arithmetic number, because the mean of its divisors is an integer number (69634210).

Almost surely, 2^274440643 is an apocalyptic number.

274440643 is a deficient number, since it is larger than the sum of its proper divisors (4096197).

274440643 is an equidigital number, since it uses as much as digits as its factorization.

274440643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096196.

The product of its (nonzero) digits is 64512, while the sum is 34.

The square root of 274440643 is about 16566.2501188410. The cubic root of 274440643 is about 649.8545181313.

The spelling of 274440643 in words is "two hundred seventy-four million, four hundred forty thousand, six hundred forty-three".