438590947 has 2 divisors, whose sum is σ = 438590948. Its totient is φ = 438590946.

The previous prime is 438590923. The next prime is 438590951. The reversal of 438590947 is 749095834.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438590947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 438590947.

It is not a weakly prime, because it can be changed into another prime (438590917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219295473 + 219295474.

It is an arithmetic number, because the mean of its divisors is an integer number (219295474).

Almost surely, 2^438590947 is an apocalyptic number.

438590947 is a deficient number, since it is larger than the sum of its proper divisors (1).

438590947 is an equidigital number, since it uses as much as digits as its factorization.

438590947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 438590947 is about 20942.5630475355. The cubic root of 438590947 is about 759.7777206605. Note that the first 4 decimals are identical.

The spelling of 438590947 in words is "four hundred thirty-eight million, five hundred ninety thousand, nine hundred forty-seven".