268208629 has 4 divisors (see below), whose sum is σ = 288840076. Its totient is φ = 247577184.

The previous prime is 268208623. The next prime is 268208639. The reversal of 268208629 is 926802862.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40259025 + 227949604 = 6345^2 + 15098^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268208629 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 (268208623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10315704 + ... + 10315729.

It is an arithmetic number, because the mean of its divisors is an integer number (72210019).

Almost surely, 2^268208629 is an apocalyptic number.

It is an amenable number.

268208629 is a deficient number, since it is larger than the sum of its proper divisors (20631447).

268208629 is a wasteful number, since it uses less digits than its factorization.

268208629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20631446.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 268208629 is about 16377.0763263777. The cubic root of 268208629 is about 644.8978296994.

The spelling of 268208629 in words is "two hundred sixty-eight million, two hundred eight thousand, six hundred twenty-nine".