7947977 has 2 divisors, whose sum is σ = 7947978. Its totient is φ = 7947976.

The previous prime is 7947971. The next prime is 7947983. The reversal of 7947977 is 7797497.

It is a balanced prime because it is at equal distance from previous prime (7947971) and next prime (7947983).

It can be written as a sum of positive squares in only one way, i.e., 5112121 + 2835856 = 2261^2 + 1684^2 .

It is a cyclic number.

It is not a de Polignac number, because 7947977 - 2¹⁸ = 7685833 is a prime.

It is not a weakly prime, because it can be changed into another prime (7947971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3973988 + 3973989.

It is an arithmetic number, because the mean of its divisors is an integer number (3973989).

Almost surely, 2^7947977 is an apocalyptic number.

It is an amenable number.

7947977 is a deficient number, since it is larger than the sum of its proper divisors (1).

7947977 is an equidigital number, since it uses as much as digits as its factorization.

7947977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 777924, while the sum is 50.

The square root of 7947977 is about 2819.2156710688. The cubic root of 7947977 is about 199.5655318707.

The spelling of 7947977 in words is "seven million, nine hundred forty-seven thousand, nine hundred seventy-seven".