8040899309 has 6 divisors (see below), whose sum is σ = 8541716874. Its totient is φ = 7567904960.

The previous prime is 8040899303. The next prime is 8040899323. The reversal of 8040899309 is 9039980408.

It can be written as a sum of positive squares in 3 ways, for example, as 3386658025 + 4654241284 = 58195^2 + 68222^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8040899309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8040899303) 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, 13911302 + ... + 13911879.

It is an arithmetic number, because the mean of its divisors is an integer number (1423619479).

Almost surely, 2^8040899309 is an apocalyptic number.

It is an amenable number.

8040899309 is a deficient number, since it is larger than the sum of its proper divisors (500817565).

8040899309 is a wasteful number, since it uses less digits than its factorization.

8040899309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27823215 (or 27823198 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 8040899309 is about 89671.0617144684. The cubic root of 8040899309 is about 2003.4024840187.

The spelling of 8040899309 in words is "eight billion, forty million, eight hundred ninety-nine thousand, three hundred nine".