268856437 has 2 divisors, whose sum is σ = 268856438. Its totient is φ = 268856436.

The previous prime is 268856387. The next prime is 268856443. The reversal of 268856437 is 734658862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224220676 + 44635761 = 14974^2 + 6681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268856437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268856447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134428218 + 134428219.

It is an arithmetic number, because the mean of its divisors is an integer number (134428219).

Almost surely, 2^268856437 is an apocalyptic number.

It is an amenable number.

268856437 is a deficient number, since it is larger than the sum of its proper divisors (1).

268856437 is an equidigital number, since it uses as much as digits as its factorization.

268856437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 49.

The square root of 268856437 is about 16396.8422874650. The cubic root of 268856437 is about 645.4166224478.

The spelling of 268856437 in words is "two hundred sixty-eight million, eight hundred fifty-six thousand, four hundred thirty-seven".