274909813 has 2 divisors, whose sum is σ = 274909814. Its totient is φ = 274909812.

The previous prime is 274909807. The next prime is 274909837. The reversal of 274909813 is 318909472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175748049 + 99161764 = 13257^2 + 9958^2 .

It is a cyclic number.

It is not a de Polignac number, because 274909813 - 2¹³ = 274901621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 274909813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (274909853) 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, 137454906 + 137454907.

It is an arithmetic number, because the mean of its divisors is an integer number (137454907).

Almost surely, 2^274909813 is an apocalyptic number.

It is an amenable number.

274909813 is a deficient number, since it is larger than the sum of its proper divisors (1).

274909813 is an equidigital number, since it uses as much as digits as its factorization.

274909813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 274909813 is about 16580.4044884315. The cubic root of 274909813 is about 650.2246269010.

The spelling of 274909813 in words is "two hundred seventy-four million, nine hundred nine thousand, eight hundred thirteen".