268618997 has 4 divisors (see below), whose sum is σ = 268652076. Its totient is φ = 268585920.

The previous prime is 268618991. The next prime is 268619009. The reversal of 268618997 is 799816862.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 60855601 + 207763396 = 7801^2 + 14414^2 .

It is a cyclic number.

It is not a de Polignac number, because 268618997 - 2¹² = 268614901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268618991) 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, 4943 + ... + 23699.

It is an arithmetic number, because the mean of its divisors is an integer number (67163019).

Almost surely, 2^268618997 is an apocalyptic number.

It is an amenable number.

268618997 is a deficient number, since it is larger than the sum of its proper divisors (33079).

268618997 is a wasteful number, since it uses less digits than its factorization.

268618997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33078.

The product of its digits is 2612736, while the sum is 56.

The square root of 268618997 is about 16389.6002696832. The cubic root of 268618997 is about 645.2265670410.

The spelling of 268618997 in words is "two hundred sixty-eight million, six hundred eighteen thousand, nine hundred ninety-seven".