7977677 has 2 divisors, whose sum is σ = 7977678. Its totient is φ = 7977676.

The previous prime is 7977653. The next prime is 7977679. The reversal of 7977677 is 7767797.

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., 7295401 + 682276 = 2701^2 + 826^2 .

It is an emirp because it is prime and its reverse (7767797) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7977677 is a prime.

Together with 7977679, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7977679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3988838 + 3988839.

It is an arithmetic number, because the mean of its divisors is an integer number (3988839).

Almost surely, 2^7977677 is an apocalyptic number.

It is an amenable number.

7977677 is a deficient number, since it is larger than the sum of its proper divisors (1).

7977677 is an equidigital number, since it uses as much as digits as its factorization.

7977677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907578, while the sum is 50.

The square root of 7977677 is about 2824.4781818948. The cubic root of 7977677 is about 199.8138017048.

The spelling of 7977677 in words is "seven million, nine hundred seventy-seven thousand, six hundred seventy-seven".