7919899 has 8 divisors (see below), whose sum is σ = 8557920. Its totient is φ = 7286016.

The previous prime is 7919893. The next prime is 7919921. The reversal of 7919899 is 9989197.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7919899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7919893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3819 + ... + 5515.

It is an arithmetic number, because the mean of its divisors is an integer number (1069740).

Almost surely, 2^7919899 is an apocalyptic number.

7919899 is a deficient number, since it is larger than the sum of its proper divisors (638021).

7919899 is a wasteful number, since it uses less digits than its factorization.

7919899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069.

The product of its digits is 367416, while the sum is 52.

The square root of 7919899 is about 2814.2315114432. The cubic root of 7919899 is about 199.3302513540.

It can be divided in two parts, 79198 and 99, that added together give a palindrome (79297).

The spelling of 7919899 in words is "seven million, nine hundred nineteen thousand, eight hundred ninety-nine".