268879813 has 2 divisors, whose sum is σ = 268879814. Its totient is φ = 268879812.

The previous prime is 268879799. The next prime is 268879823. The reversal of 268879813 is 318978862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188293284 + 80586529 = 13722^2 + 8977^2 .

It is a cyclic number.

It is not a de Polignac number, because 268879813 - 2¹³ = 268871621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268879823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134439906 + 134439907.

It is an arithmetic number, because the mean of its divisors is an integer number (134439907).

Almost surely, 2^268879813 is an apocalyptic number.

It is an amenable number.

268879813 is a deficient number, since it is larger than the sum of its proper divisors (1).

268879813 is an equidigital number, since it uses as much as digits as its factorization.

268879813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 52.

The square root of 268879813 is about 16397.5550921471. Note that the first 3 decimals coincide. The cubic root of 268879813 is about 645.4353273768.

The spelling of 268879813 in words is "two hundred sixty-eight million, eight hundred seventy-nine thousand, eight hundred thirteen".