8509069431 has 6 divisors (see below), whose sum is σ = 12290878080. Its totient is φ = 5672712948.

The previous prime is 8509069399. The next prime is 8509069451. The reversal of 8509069431 is 1349609058.

It is a happy number.

It is not a de Polignac number, because 8509069431 - 2⁵ = 8509069399 is a prime.

It is a super-2 number, since 2×8509069431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8509069451) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 472726071 + ... + 472726088.

It is an arithmetic number, because the mean of its divisors is an integer number (2048479680).

Almost surely, 2^8509069431 is an apocalyptic number.

8509069431 is a deficient number, since it is larger than the sum of its proper divisors (3781808649).

8509069431 is a wasteful number, since it uses less digits than its factorization.

8509069431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945452165 (or 945452162 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 8509069431 is about 92244.6173551606. The cubic root of 8509069431 is about 2041.5531417634.

The spelling of 8509069431 in words is "eight billion, five hundred nine million, sixty-nine thousand, four hundred thirty-one".