268204691 has 2 divisors, whose sum is σ = 268204692. Its totient is φ = 268204690.

The previous prime is 268204667. The next prime is 268204693. The reversal of 268204691 is 196402862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268204691 - 2²² = 264010387 is a prime.

Together with 268204693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268204693) 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 as a sum of consecutive naturals, namely, 134102345 + 134102346.

It is an arithmetic number, because the mean of its divisors is an integer number (134102346).

Almost surely, 2^268204691 is an apocalyptic number.

268204691 is a deficient number, since it is larger than the sum of its proper divisors (1).

268204691 is an equidigital number, since it uses as much as digits as its factorization.

268204691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 268204691 is about 16376.9560969064. The cubic root of 268204691 is about 644.8946734250.

The spelling of 268204691 in words is "two hundred sixty-eight million, two hundred four thousand, six hundred ninety-one".