8146431947 has 4 divisors (see below), whose sum is σ = 8191942920. Its totient is φ = 8100920976.

The previous prime is 8146431929. The next prime is 8146431961. The reversal of 8146431947 is 7491346418.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7491346418 = 2 ⋅3745673209.

It is a cyclic number.

It is not a de Polignac number, because 8146431947 - 2⁶ = 8146431883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8146431967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22755218 + ... + 22755575.

It is an arithmetic number, because the mean of its divisors is an integer number (2047985730).

Almost surely, 2^8146431947 is an apocalyptic number.

8146431947 is a deficient number, since it is larger than the sum of its proper divisors (45510973).

8146431947 is a wasteful number, since it uses less digits than its factorization.

8146431947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45510972.

The product of its digits is 580608, while the sum is 47.

The square root of 8146431947 is about 90257.5866451126. The cubic root of 8146431947 is about 2012.1289577494.

The spelling of 8146431947 in words is "eight billion, one hundred forty-six million, four hundred thirty-one thousand, nine hundred forty-seven".