438289949 has 2 divisors, whose sum is σ = 438289950. Its totient is φ = 438289948.

The previous prime is 438289933. The next prime is 438290051. The reversal of 438289949 is 949982834.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309126724 + 129163225 = 17582^2 + 11365^2 .

It is a cyclic number.

It is not a de Polignac number, because 438289949 - 2⁴ = 438289933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 438289894 and 438289903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438289249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219144974 + 219144975.

It is an arithmetic number, because the mean of its divisors is an integer number (219144975).

Almost surely, 2^438289949 is an apocalyptic number.

It is an amenable number.

438289949 is a deficient number, since it is larger than the sum of its proper divisors (1).

438289949 is an equidigital number, since it uses as much as digits as its factorization.

438289949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 56.

The square root of 438289949 is about 20935.3755399802. The cubic root of 438289949 is about 759.6038730912.

The spelling of 438289949 in words is "four hundred thirty-eight million, two hundred eighty-nine thousand, nine hundred forty-nine".