275730397 has 2 divisors, whose sum is σ = 275730398. Its totient is φ = 275730396.

The previous prime is 275730391. The next prime is 275730457. The reversal of 275730397 is 793037572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269649241 + 6081156 = 16421^2 + 2466^2 .

It is a cyclic number.

It is not a de Polignac number, because 275730397 - 2²⁷ = 141512669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275730391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137865198 + 137865199.

It is an arithmetic number, because the mean of its divisors is an integer number (137865199).

Almost surely, 2^275730397 is an apocalyptic number.

It is an amenable number.

275730397 is a deficient number, since it is larger than the sum of its proper divisors (1).

275730397 is an equidigital number, since it uses as much as digits as its factorization.

275730397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 277830, while the sum is 43.

The square root of 275730397 is about 16605.1316465724. The cubic root of 275730397 is about 650.8709405848.

The spelling of 275730397 in words is "two hundred seventy-five million, seven hundred thirty thousand, three hundred ninety-seven".