267921161 has 2 divisors, whose sum is σ = 267921162. Its totient is φ = 267921160.

The previous prime is 267921133. The next prime is 267921179. The reversal of 267921161 is 161129762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206784400 + 61136761 = 14380^2 + 7819^2 .

It is a cyclic number.

It is not a de Polignac number, because 267921161 - 2⁶ = 267921097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (267921131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133960580 + 133960581.

It is an arithmetic number, because the mean of its divisors is an integer number (133960581).

Almost surely, 2^267921161 is an apocalyptic number.

It is an amenable number.

267921161 is a deficient number, since it is larger than the sum of its proper divisors (1).

267921161 is an equidigital number, since it uses as much as digits as its factorization.

267921161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 267921161 is about 16368.2974374246. The cubic root of 267921161 is about 644.6673452407.

The spelling of 267921161 in words is "two hundred sixty-seven million, nine hundred twenty-one thousand, one hundred sixty-one".