274426381 has 2 divisors, whose sum is σ = 274426382. Its totient is φ = 274426380.

The previous prime is 274426351. The next prime is 274426403. The reversal of 274426381 is 183624472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252015625 + 22410756 = 15875^2 + 4734^2 .

It is a cyclic number.

It is not a de Polignac number, because 274426381 - 2⁵ = 274426349 is a prime.

It is a super-2 number, since 2×274426381² = 150619677177514322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 274426381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (274426331) 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, 137213190 + 137213191.

It is an arithmetic number, because the mean of its divisors is an integer number (137213191).

Almost surely, 2^274426381 is an apocalyptic number.

It is an amenable number.

274426381 is a deficient number, since it is larger than the sum of its proper divisors (1).

274426381 is an equidigital number, since it uses as much as digits as its factorization.

274426381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The square root of 274426381 is about 16565.8196597693. The cubic root of 274426381 is about 649.8432608267.

The spelling of 274426381 in words is "two hundred seventy-four million, four hundred twenty-six thousand, three hundred eighty-one".