274905643 has 2 divisors, whose sum is σ = 274905644. Its totient is φ = 274905642.

The previous prime is 274905611. The next prime is 274905649. The reversal of 274905643 is 346509472.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 274905643 - 2⁵ = 274905611 is a prime.

It is a super-2 number, since 2×274905643² = 151146225106486898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 274905596 and 274905605.

It is not a weakly prime, because it can be changed into another prime (274905649) 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 as a sum of consecutive naturals, namely, 137452821 + 137452822.

It is an arithmetic number, because the mean of its divisors is an integer number (137452822).

Almost surely, 2^274905643 is an apocalyptic number.

274905643 is a deficient number, since it is larger than the sum of its proper divisors (1).

274905643 is an equidigital number, since it uses as much as digits as its factorization.

274905643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 274905643 is about 16580.2787371021. The cubic root of 274905643 is about 650.2213392163.

It can be divided in two parts, 27490 and 5643, that added together give a palindrome (33133).

The spelling of 274905643 in words is "two hundred seventy-four million, nine hundred five thousand, six hundred forty-three".