8077199909 has 4 divisors (see below), whose sum is σ = 8190963360. Its totient is φ = 7963436460.

The previous prime is 8077199891. The next prime is 8077199917. The reversal of 8077199909 is 9099917708.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8077199909 - 2³² = 3782232613 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 (8077199929) 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, 56881619 + ... + 56881760.

It is an arithmetic number, because the mean of its divisors is an integer number (2047740840).

Almost surely, 2^8077199909 is an apocalyptic number.

It is an amenable number.

8077199909 is a deficient number, since it is larger than the sum of its proper divisors (113763451).

8077199909 is a wasteful number, since it uses less digits than its factorization.

8077199909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113763450.

The product of its (nonzero) digits is 2571912, while the sum is 59.

The square root of 8077199909 is about 89873.2435655908. The cubic root of 8077199909 is about 2006.4127421430.

The spelling of 8077199909 in words is "eight billion, seventy-seven million, one hundred ninety-nine thousand, nine hundred nine".