268954781 has 4 divisors (see below), whose sum is σ = 269201052. Its totient is φ = 268708512.

The previous prime is 268954771. The next prime is 268954799. The reversal of 268954781 is 187459862.

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 53158681 + 215796100 = 7291^2 + 14690^2 .

It is a cyclic number.

It is not a de Polignac number, because 268954781 - 2⁶ = 268954717 is a prime.

It is a super-2 number, since 2×268954781² = 144673348445515922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268954771) 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, 121490 + ... + 123683.

It is an arithmetic number, because the mean of its divisors is an integer number (67300263).

Almost surely, 2^268954781 is an apocalyptic number.

It is an amenable number.

268954781 is a deficient number, since it is larger than the sum of its proper divisors (246271).

268954781 is a wasteful number, since it uses less digits than its factorization.

268954781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246270.

The product of its digits is 967680, while the sum is 50.

The square root of 268954781 is about 16399.8408833744. The cubic root of 268954781 is about 645.4953077062.

The spelling of 268954781 in words is "two hundred sixty-eight million, nine hundred fifty-four thousand, seven hundred eighty-one".