247697 has 2 divisors, whose sum is σ = 247698. Its totient is φ = 247696.

The previous prime is 247693. The next prime is 247711. The reversal of 247697 is 796742.

247697 is nontrivially palindromic in base 13.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246016 + 1681 = 496^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 247697 - 2² = 247693 is a prime.

It is a super-2 number, since 2×247697² = 122707607618, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (247691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123848 + 123849.

It is an arithmetic number, because the mean of its divisors is an integer number (123849).

2²⁴⁷⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

247697 is a deficient number, since it is larger than the sum of its proper divisors (1).

247697 is an equidigital number, since it uses as much as digits as its factorization.

247697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The square root of 247697 is about 497.6916716201. The cubic root of 247697 is about 62.8020155681.

The spelling of 247697 in words is "two hundred forty-seven thousand, six hundred ninety-seven".