971977 has 2 divisors, whose sum is σ = 971978. Its totient is φ = 971976.

The previous prime is 971959. The next prime is 971981. The reversal of 971977 is 779179.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 968256 + 3721 = 984^2 + 61^2 .

It is a cyclic number.

It is not a de Polignac number, because 971977 - 2¹¹ = 969929 is a prime.

It is not a weakly prime, because it can be changed into another prime (971917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485988 + 485989.

It is an arithmetic number, because the mean of its divisors is an integer number (485989).

2⁹⁷¹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

971977 is a deficient number, since it is larger than the sum of its proper divisors (1).

971977 is an equidigital number, since it uses as much as digits as its factorization.

971977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27783, while the sum is 40.

The square root of 971977 is about 985.8889389784. Note that the first 3 decimals coincide. The cubic root of 971977 is about 99.0570361404.

The spelling of 971977 in words is "nine hundred seventy-one thousand, nine hundred seventy-seven".