438423977 has 2 divisors, whose sum is σ = 438423978. Its totient is φ = 438423976.

The previous prime is 438423967. The next prime is 438423991. The reversal of 438423977 is 779324834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348344896 + 90079081 = 18664^2 + 9491^2 .

It is a cyclic number.

It is not a de Polignac number, because 438423977 - 2⁸ = 438423721 is a prime.

It is not a weakly prime, because it can be changed into another prime (438423967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219211988 + 219211989.

It is an arithmetic number, because the mean of its divisors is an integer number (219211989).

Almost surely, 2^438423977 is an apocalyptic number.

It is an amenable number.

438423977 is a deficient number, since it is larger than the sum of its proper divisors (1).

438423977 is an equidigital number, since it uses as much as digits as its factorization.

438423977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 47.

The square root of 438423977 is about 20938.5762887547. The cubic root of 438423977 is about 759.6812935388.

The spelling of 438423977 in words is "four hundred thirty-eight million, four hundred twenty-three thousand, nine hundred seventy-seven".