977971 has 2 divisors, whose sum is σ = 977972. Its totient is φ = 977970.

The previous prime is 977927. The next prime is 978001. The reversal of 977971 is 179779.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (179779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 977971 - 2¹⁹ = 453683 is a prime.

977971 is a lucky number.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (977671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488985 + 488986.

It is an arithmetic number, because the mean of its divisors is an integer number (488986).

2⁹⁷⁷⁹⁷¹ is an apocalyptic number.

977971 is a deficient number, since it is larger than the sum of its proper divisors (1).

977971 is an equidigital number, since it uses as much as digits as its factorization.

977971 is an evil number, because the sum of its binary digits is even.

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

The square root of 977971 is about 988.9241629164. The cubic root of 977971 is about 99.2602410614.

The spelling of 977971 in words is "nine hundred seventy-seven thousand, nine hundred seventy-one".