814973977 has 2 divisors, whose sum is σ = 814973978. Its totient is φ = 814973976.

The previous prime is 814973963. The next prime is 814973983. The reversal of 814973977 is 779379418.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677873296 + 137100681 = 26036^2 + 11709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-814973977 is a prime.

It is not a weakly prime, because it can be changed into another prime (814973917) 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, 407486988 + 407486989.

It is an arithmetic number, because the mean of its divisors is an integer number (407486989).

Almost surely, 2^814973977 is an apocalyptic number.

It is an amenable number.

814973977 is a deficient number, since it is larger than the sum of its proper divisors (1).

814973977 is an equidigital number, since it uses as much as digits as its factorization.

814973977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2667168, while the sum is 55.

The square root of 814973977 is about 28547.7490706360. The cubic root of 814973977 is about 934.0739215368.

The spelling of 814973977 in words is "eight hundred fourteen million, nine hundred seventy-three thousand, nine hundred seventy-seven".