4431631947 has 16 divisors (see below), whose sum is σ = 5990906880. Its totient is φ = 2913638112.

The previous prime is 4431631937. The next prime is 4431631993. The reversal of 4431631947 is 7491361344.

4431631947 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4431631947 - 2⁷ = 4431631819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4431631899 and 4431631908.

It is not an unprimeable number, because it can be changed into a prime (4431631937) 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 in 15 ways as a sum of consecutive naturals, for example, 40629 + ... + 102537.

It is an arithmetic number, because the mean of its divisors is an integer number (374431680).

Almost surely, 2^4431631947 is an apocalyptic number.

4431631947 is a deficient number, since it is larger than the sum of its proper divisors (1559274933).

4431631947 is a wasteful number, since it uses less digits than its factorization.

4431631947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62242.

The product of its digits is 217728, while the sum is 42.

The square root of 4431631947 is about 66570.5035807902. The cubic root of 4431631947 is about 1642.5599454548.

The spelling of 4431631947 in words is "four billion, four hundred thirty-one million, six hundred thirty-one thousand, nine hundred forty-seven".