274831861 has 2 divisors, whose sum is σ = 274831862. Its totient is φ = 274831860.

The previous prime is 274831783. The next prime is 274831919. The reversal of 274831861 is 168138472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 273406225 + 1425636 = 16535^2 + 1194^2 .

It is a cyclic number.

It is not a de Polignac number, because 274831861 - 2¹⁹ = 274307573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (274831261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137415930 + 137415931.

It is an arithmetic number, because the mean of its divisors is an integer number (137415931).

Almost surely, 2^274831861 is an apocalyptic number.

It is an amenable number.

274831861 is a deficient number, since it is larger than the sum of its proper divisors (1).

274831861 is an equidigital number, since it uses as much as digits as its factorization.

274831861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 274831861 is about 16578.0535950394. The cubic root of 274831861 is about 650.1631629842.

The spelling of 274831861 in words is "two hundred seventy-four million, eight hundred thirty-one thousand, eight hundred sixty-one".