1097887171 has 2 divisors, whose sum is σ = 1097887172. Its totient is φ = 1097887170.

The previous prime is 1097887157. The next prime is 1097887181. The reversal of 1097887171 is 1717887901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1097887171 - 2⁵ = 1097887139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1097887111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548943585 + 548943586.

It is an arithmetic number, because the mean of its divisors is an integer number (548943586).

Almost surely, 2^1097887171 is an apocalyptic number.

1097887171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1097887171 is an equidigital number, since it uses as much as digits as its factorization.

1097887171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 49.

The square root of 1097887171 is about 33134.3804982076. The cubic root of 1097887171 is about 1031.6187732551.

The spelling of 1097887171 in words is "one billion, ninety-seven million, eight hundred eighty-seven thousand, one hundred seventy-one".