268917497 has 4 divisors (see below), whose sum is σ = 271384740. Its totient is φ = 266450256.

The previous prime is 268917491. The next prime is 268917499. The reversal of 268917497 is 794719862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794719862 = 2 ⋅397359931.

It can be written as a sum of positive squares in 2 ways, for example, as 139617856 + 129299641 = 11816^2 + 11371^2 .

It is a cyclic number.

It is not a de Polignac number, because 268917497 - 2⁶ = 268917433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268917491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233458 + ... + 1233675.

It is an arithmetic number, because the mean of its divisors is an integer number (67846185).

Almost surely, 2^268917497 is an apocalyptic number.

It is an amenable number.

268917497 is a deficient number, since it is larger than the sum of its proper divisors (2467243).

268917497 is a wasteful number, since it uses less digits than its factorization.

268917497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467242.

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

The square root of 268917497 is about 16398.7041256314. The cubic root of 268917497 is about 645.4654789507.

The spelling of 268917497 in words is "two hundred sixty-eight million, nine hundred seventeen thousand, four hundred ninety-seven".