320423977 has 2 divisors, whose sum is σ = 320423978. Its totient is φ = 320423976.

The previous prime is 320423953. The next prime is 320423993. The reversal of 320423977 is 779324023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301925376 + 18498601 = 17376^2 + 4301^2 .

It is a cyclic number.

It is not a de Polignac number, because 320423977 - 2²³ = 312035369 is a prime.

It is not a weakly prime, because it can be changed into another prime (320423927) 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, 160211988 + 160211989.

It is an arithmetic number, because the mean of its divisors is an integer number (160211989).

Almost surely, 2^320423977 is an apocalyptic number.

It is an amenable number.

320423977 is a deficient number, since it is larger than the sum of its proper divisors (1).

320423977 is an equidigital number, since it uses as much as digits as its factorization.

320423977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 320423977 is about 17900.3904147368. The cubic root of 320423977 is about 684.2923247210.

The spelling of 320423977 in words is "three hundred twenty million, four hundred twenty-three thousand, nine hundred seventy-seven".