268635997 has 4 divisors (see below), whose sum is σ = 307012576. Its totient is φ = 230259420.

The previous prime is 268635979. The next prime is 268636061. The reversal of 268635997 is 799536862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268635997 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 (268635907) 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, 19188279 + ... + 19188292.

It is an arithmetic number, because the mean of its divisors is an integer number (76753144).

Almost surely, 2^268635997 is an apocalyptic number.

It is an amenable number.

268635997 is a deficient number, since it is larger than the sum of its proper divisors (38376579).

268635997 is an equidigital number, since it uses as much as digits as its factorization.

268635997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38376578.

The product of its digits is 4898880, while the sum is 55.

The square root of 268635997 is about 16390.1188830344. The cubic root of 268635997 is about 645.2401781661.

It can be divided in two parts, 2686 and 35997, that added together give a palindrome (38683).

The spelling of 268635997 in words is "two hundred sixty-eight million, six hundred thirty-five thousand, nine hundred ninety-seven".