7938977 has 2 divisors, whose sum is σ = 7938978. Its totient is φ = 7938976.

The previous prime is 7938929. The next prime is 7938991. The reversal of 7938977 is 7798397.

7938977 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6806881 + 1132096 = 2609^2 + 1064^2 .

It is an emirp because it is prime and its reverse (7798397) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7938977 - 2²² = 3744673 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (7938907) 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, 3969488 + 3969489.

It is an arithmetic number, because the mean of its divisors is an integer number (3969489).

Almost surely, 2^7938977 is an apocalyptic number.

It is an amenable number.

7938977 is a deficient number, since it is larger than the sum of its proper divisors (1).

7938977 is an equidigital number, since it uses as much as digits as its factorization.

7938977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 666792, while the sum is 50.

The square root of 7938977 is about 2817.6190303162. The cubic root of 7938977 is about 199.4901765043.

The spelling of 7938977 in words is "seven million, nine hundred thirty-eight thousand, nine hundred seventy-seven".