268971497 has 2 divisors, whose sum is σ = 268971498. Its totient is φ = 268971496.

The previous prime is 268971431. The next prime is 268971503. The reversal of 268971497 is 794179862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226773481 + 42198016 = 15059^2 + 6496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268971497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268971797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134485748 + 134485749.

It is an arithmetic number, because the mean of its divisors is an integer number (134485749).

Almost surely, 2^268971497 is an apocalyptic number.

It is an amenable number.

268971497 is a deficient number, since it is larger than the sum of its proper divisors (1).

268971497 is an equidigital number, since it uses as much as digits as its factorization.

268971497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 53.

The square root of 268971497 is about 16400.3505145469. The cubic root of 268971497 is about 645.5086803086.

The spelling of 268971497 in words is "two hundred sixty-eight million, nine hundred seventy-one thousand, four hundred ninety-seven".