797977 has 2 divisors, whose sum is σ = 797978. Its totient is φ = 797976.

The previous prime is 797957. The next prime is 797987. The reversal of 797977 is 779797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 793881 + 4096 = 891^2 + 64^2 .

It is an emirp because it is prime and its reverse (779797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 797977 - 2¹⁵ = 765209 is a prime.

It is not a weakly prime, because it can be changed into another prime (797917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398988 + 398989.

It is an arithmetic number, because the mean of its divisors is an integer number (398989).

2⁷⁹⁷⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

797977 is a deficient number, since it is larger than the sum of its proper divisors (1).

797977 is an equidigital number, since it uses as much as digits as its factorization.

797977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194481, while the sum is 46.

The square root of 797977 is about 893.2955837795. The cubic root of 797977 is about 92.7534611699.

The spelling of 797977 in words is "seven hundred ninety-seven thousand, nine hundred seventy-seven".