268121173 has 2 divisors, whose sum is σ = 268121174. Its totient is φ = 268121172.

The previous prime is 268121159. The next prime is 268121219. The reversal of 268121173 is 371121862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207561649 + 60559524 = 14407^2 + 7782^2 .

It is a cyclic number.

It is not a de Polignac number, because 268121173 - 2⁹ = 268120661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268121123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134060586 + 134060587.

It is an arithmetic number, because the mean of its divisors is an integer number (134060587).

Almost surely, 2^268121173 is an apocalyptic number.

It is an amenable number.

268121173 is a deficient number, since it is larger than the sum of its proper divisors (1).

268121173 is an equidigital number, since it uses as much as digits as its factorization.

268121173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 268121173 is about 16374.4060350292. The cubic root of 268121173 is about 644.8277271625.

The spelling of 268121173 in words is "two hundred sixty-eight million, one hundred twenty-one thousand, one hundred seventy-three".