274861643 has 4 divisors (see below), whose sum is σ = 314127600. Its totient is φ = 235595688.

The previous prime is 274861621. The next prime is 274861679. The reversal of 274861643 is 346168472.

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-274861643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 274861643.

It is not an unprimeable number, because it can be changed into a prime (274861843) 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, 19632968 + ... + 19632981.

It is an arithmetic number, because the mean of its divisors is an integer number (78531900).

Almost surely, 2^274861643 is an apocalyptic number.

274861643 is a deficient number, since it is larger than the sum of its proper divisors (39265957).

274861643 is an equidigital number, since it uses as much as digits as its factorization.

274861643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39265956.

The product of its digits is 193536, while the sum is 41.

The square root of 274861643 is about 16578.9518064322. The cubic root of 274861643 is about 650.1866469910.

The spelling of 274861643 in words is "two hundred seventy-four million, eight hundred sixty-one thousand, six hundred forty-three".