268849621 has 2 divisors, whose sum is σ = 268849622. Its totient is φ = 268849620.

The previous prime is 268849573. The next prime is 268849649. The reversal of 268849621 is 126948862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151560721 + 117288900 = 12311^2 + 10830^2 .

It is a cyclic number.

It is not a de Polignac number, because 268849621 - 2⁹ = 268849109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268849661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134424810 + 134424811.

It is an arithmetic number, because the mean of its divisors is an integer number (134424811).

Almost surely, 2^268849621 is an apocalyptic number.

It is an amenable number.

268849621 is a deficient number, since it is larger than the sum of its proper divisors (1).

268849621 is an equidigital number, since it uses as much as digits as its factorization.

268849621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 46.

The square root of 268849621 is about 16396.6344412504. The cubic root of 268849621 is about 645.4111682397.

The spelling of 268849621 in words is "two hundred sixty-eight million, eight hundred forty-nine thousand, six hundred twenty-one".