268349721 has 4 divisors (see below), whose sum is σ = 357799632. Its totient is φ = 178899812.

The previous prime is 268349699. The next prime is 268349723. The reversal of 268349721 is 127943862.

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 not a de Polignac number, because 268349721 - 2⁵ = 268349689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (268349723) 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, 44724951 + ... + 44724956.

It is an arithmetic number, because the mean of its divisors is an integer number (89449908).

Almost surely, 2^268349721 is an apocalyptic number.

It is an amenable number.

268349721 is a deficient number, since it is larger than the sum of its proper divisors (89449911).

268349721 is an equidigital number, since it uses as much as digits as its factorization.

268349721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89449910.

The product of its digits is 145152, while the sum is 42.

The square root of 268349721 is about 16381.3833664926. The cubic root of 268349721 is about 645.0108933921.

The spelling of 268349721 in words is "two hundred sixty-eight million, three hundred forty-nine thousand, seven hundred twenty-one".