275638247 has 2 divisors, whose sum is σ = 275638248. Its totient is φ = 275638246.

The previous prime is 275638217. The next prime is 275638303. The reversal of 275638247 is 742836572.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 275638247 - 2⁶ = 275638183 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 275638198 and 275638207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275638217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137819123 + 137819124.

It is an arithmetic number, because the mean of its divisors is an integer number (137819124).

Almost surely, 2^275638247 is an apocalyptic number.

275638247 is a deficient number, since it is larger than the sum of its proper divisors (1).

275638247 is an equidigital number, since it uses as much as digits as its factorization.

275638247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 44.

The square root of 275638247 is about 16602.3566700634. The cubic root of 275638247 is about 650.7984247739.

The spelling of 275638247 in words is "two hundred seventy-five million, six hundred thirty-eight thousand, two hundred forty-seven".