274867721 has 2 divisors, whose sum is σ = 274867722. Its totient is φ = 274867720.

The previous prime is 274867673. The next prime is 274867727. The reversal of 274867721 is 127768472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172554496 + 102313225 = 13136^2 + 10115^2 .

It is a cyclic number.

It is not a de Polignac number, because 274867721 - 2⁶ = 274867657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (274867727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137433860 + 137433861.

It is an arithmetic number, because the mean of its divisors is an integer number (137433861).

Almost surely, 2^274867721 is an apocalyptic number.

It is an amenable number.

274867721 is a deficient number, since it is larger than the sum of its proper divisors (1).

274867721 is an equidigital number, since it uses as much as digits as its factorization.

274867721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 263424, while the sum is 44.

The square root of 274867721 is about 16579.1351101317. The cubic root of 274867721 is about 650.1914394693.

The spelling of 274867721 in words is "two hundred seventy-four million, eight hundred sixty-seven thousand, seven hundred twenty-one".