274090081 has 2 divisors, whose sum is σ = 274090082. Its totient is φ = 274090080.

The previous prime is 274090079. The next prime is 274090093. The reversal of 274090081 is 180090472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 272085025 + 2005056 = 16495^2 + 1416^2 .

It is a cyclic number.

It is not a de Polignac number, because 274090081 - 2¹ = 274090079 is a prime.

It is a super-2 number, since 2×274090081² = 150250745005173122, which contains 22 as substring.

Together with 274090079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (274090021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137045040 + 137045041.

It is an arithmetic number, because the mean of its divisors is an integer number (137045041).

Almost surely, 2^274090081 is an apocalyptic number.

It is an amenable number.

274090081 is a deficient number, since it is larger than the sum of its proper divisors (1).

274090081 is an equidigital number, since it uses as much as digits as its factorization.

274090081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 274090081 is about 16555.6661297575. Note that the first 3 decimals coincide. The cubic root of 274090081 is about 649.5776988684.

The spelling of 274090081 in words is "two hundred seventy-four million, ninety thousand, eighty-one".