171116977 has 2 divisors, whose sum is σ = 171116978. Its totient is φ = 171116976.

The previous prime is 171116947. The next prime is 171116999. The reversal of 171116977 is 779611171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148449856 + 22667121 = 12184^2 + 4761^2 .

It is a cyclic number.

It is not a de Polignac number, because 171116977 - 2¹¹ = 171114929 is a prime.

It is not a weakly prime, because it can be changed into another prime (171116947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85558488 + 85558489.

It is an arithmetic number, because the mean of its divisors is an integer number (85558489).

Almost surely, 2^171116977 is an apocalyptic number.

It is an amenable number.

171116977 is a deficient number, since it is larger than the sum of its proper divisors (1).

171116977 is an equidigital number, since it uses as much as digits as its factorization.

171116977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18522, while the sum is 40.

The square root of 171116977 is about 13081.1687933456. The cubic root of 171116977 is about 555.1764468871.

The spelling of 171116977 in words is "one hundred seventy-one million, one hundred sixteen thousand, nine hundred seventy-seven".