842977 has 2 divisors, whose sum is σ = 842978. Its totient is φ = 842976.

The previous prime is 842969. The next prime is 842981. The reversal of 842977 is 779248.

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., 571536 + 271441 = 756^2 + 521^2 .

It is a cyclic number.

It is not a de Polignac number, because 842977 - 2³ = 842969 is a prime.

It is a super-2 number, since 2×842977² = 1421220445058, which contains 22 as substring.

It is a d-powerful number, because it can be written as 8³ + 4⁷ + 9 + 2⁷ + 7⁴ + 7⁷ .

It is not a weakly prime, because it can be changed into another prime (842957) 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, 421488 + 421489.

It is an arithmetic number, because the mean of its divisors is an integer number (421489).

2⁸⁴²⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

842977 is a deficient number, since it is larger than the sum of its proper divisors (1).

842977 is an equidigital number, since it uses as much as digits as its factorization.

842977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 37.

The square root of 842977 is about 918.1377892234. The cubic root of 842977 is about 94.4652130668.

The spelling of 842977 in words is "eight hundred forty-two thousand, nine hundred seventy-seven".