268219949 has 4 divisors (see below), whose sum is σ = 268895964. Its totient is φ = 267543936.

The previous prime is 268219937. The next prime is 268219957. The reversal of 268219949 is 949912862.

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 172081924 + 96138025 = 13118^2 + 9805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268219949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 268219897 and 268219906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268219249) 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, 337412 + ... + 338205.

It is an arithmetic number, because the mean of its divisors is an integer number (67223991).

Almost surely, 2^268219949 is an apocalyptic number.

It is an amenable number.

268219949 is a deficient number, since it is larger than the sum of its proper divisors (676015).

268219949 is an equidigital number, since it uses as much as digits as its factorization.

268219949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676014.

The product of its digits is 559872, while the sum is 50.

The square root of 268219949 is about 16377.4219277638. The cubic root of 268219949 is about 644.9069024136.

The spelling of 268219949 in words is "two hundred sixty-eight million, two hundred nineteen thousand, nine hundred forty-nine".