423977 has 2 divisors, whose sum is σ = 423978. Its totient is φ = 423976.

The previous prime is 423961. The next prime is 423989. The reversal of 423977 is 779324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 379456 + 44521 = 616^2 + 211^2 .

It is a cyclic number.

It is not a de Polignac number, because 423977 - 2⁴ = 423961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (423277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211988 + 211989.

It is an arithmetic number, because the mean of its divisors is an integer number (211989).

2⁴²³⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

423977 is a deficient number, since it is larger than the sum of its proper divisors (1).

423977 is an equidigital number, since it uses as much as digits as its factorization.

423977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 32.

The square root of 423977 is about 651.1351626199. The cubic root of 423977 is about 75.1243566546.

The spelling of 423977 in words is "four hundred twenty-three thousand, nine hundred seventy-seven".