8424931309 has 4 divisors (see below), whose sum is σ = 8436002940. Its totient is φ = 8413859680.

The previous prime is 8424931301. The next prime is 8424931321. The reversal of 8424931309 is 9031394248.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2647411209 + 5777520100 = 51453^2 + 76010^2 .

It is a cyclic number.

It is not a de Polignac number, because 8424931309 - 2³ = 8424931301 is a prime.

It is a super-2 number, since 2×8424931309² (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 (8424931301) 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, 5534674 + ... + 5536195.

It is an arithmetic number, because the mean of its divisors is an integer number (2109000735).

Almost surely, 2^8424931309 is an apocalyptic number.

It is an amenable number.

8424931309 is a deficient number, since it is larger than the sum of its proper divisors (11071631).

8424931309 is a wasteful number, since it uses less digits than its factorization.

8424931309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11071630.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 8424931309 is about 91787.4245689463. The cubic root of 8424931309 is about 2034.8018456128.

The spelling of 8424931309 in words is "eight billion, four hundred twenty-four million, nine hundred thirty-one thousand, three hundred nine".