8429947031 has 4 divisors (see below), whose sum is σ = 9196305864. Its totient is φ = 7663588200.

The previous prime is 8429947021. The next prime is 8429947091. The reversal of 8429947031 is 1307499248.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8429947031 - 2²⁶ = 8362838167 is a prime.

It is a super-2 number, since 2×8429947031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8429947021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383179400 + ... + 383179421.

It is an arithmetic number, because the mean of its divisors is an integer number (2299076466).

Almost surely, 2^8429947031 is an apocalyptic number.

8429947031 is a deficient number, since it is larger than the sum of its proper divisors (766358833).

8429947031 is a wasteful number, since it uses less digits than its factorization.

8429947031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766358832.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 8429947031 is about 91814.7429937044. The cubic root of 8429947031 is about 2035.2055670329.

The spelling of 8429947031 in words is "eight billion, four hundred twenty-nine million, nine hundred forty-seven thousand, thirty-one".