438649747 has 2 divisors, whose sum is σ = 438649748. Its totient is φ = 438649746.

The previous prime is 438649727. The next prime is 438649769. The reversal of 438649747 is 747946834.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438649747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 438649694 and 438649703.

It is not a weakly prime, because it can be changed into another prime (438649727) 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, 219324873 + 219324874.

It is an arithmetic number, because the mean of its divisors is an integer number (219324874).

Almost surely, 2^438649747 is an apocalyptic number.

438649747 is a deficient number, since it is larger than the sum of its proper divisors (1).

438649747 is an equidigital number, since it uses as much as digits as its factorization.

438649747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 52.

The square root of 438649747 is about 20943.9668401189. The cubic root of 438649747 is about 759.8116725193.

The spelling of 438649747 in words is "four hundred thirty-eight million, six hundred forty-nine thousand, seven hundred forty-seven".