7977863 has 2 divisors, whose sum is σ = 7977864. Its totient is φ = 7977862.

The previous prime is 7977857. The next prime is 7977869. The reversal of 7977863 is 3687797.

It is a balanced prime because it is at equal distance from previous prime (7977857) and next prime (7977869).

It is a cyclic number.

It is not a de Polignac number, because 7977863 - 2⁶ = 7977799 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7977869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3988931 + 3988932.

It is an arithmetic number, because the mean of its divisors is an integer number (3988932).

Almost surely, 2^7977863 is an apocalyptic number.

7977863 is a deficient number, since it is larger than the sum of its proper divisors (1).

7977863 is an equidigital number, since it uses as much as digits as its factorization.

7977863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 47.

The square root of 7977863 is about 2824.5111081389. The cubic root of 7977863 is about 199.8153545828.

The spelling of 7977863 in words is "seven million, nine hundred seventy-seven thousand, eight hundred sixty-three".