268121851 has 2 divisors, whose sum is σ = 268121852. Its totient is φ = 268121850.

The previous prime is 268121839. The next prime is 268121891. The reversal of 268121851 is 158121862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268121851 - 2⁷ = 268121723 is a prime.

It is not a weakly prime, because it can be changed into another prime (268121891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134060925 + 134060926.

It is an arithmetic number, because the mean of its divisors is an integer number (134060926).

Almost surely, 2^268121851 is an apocalyptic number.

268121851 is a deficient number, since it is larger than the sum of its proper divisors (1).

268121851 is an equidigital number, since it uses as much as digits as its factorization.

268121851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 34.

The square root of 268121851 is about 16374.4267380571. The cubic root of 268121851 is about 644.8282706889.

The spelling of 268121851 in words is "two hundred sixty-eight million, one hundred twenty-one thousand, eight hundred fifty-one".