7879899 has 4 divisors (see below), whose sum is σ = 10506536. Its totient is φ = 5253264.

The previous prime is 7879897. The next prime is 7879901. The reversal of 7879899 is 9989787.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (7879897) and next prime (7879901).

It is not a de Polignac number, because 7879899 - 2¹ = 7879897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7879897) 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, 1313314 + ... + 1313319.

It is an arithmetic number, because the mean of its divisors is an integer number (2626634).

Almost surely, 2^7879899 is an apocalyptic number.

7879899 is a deficient number, since it is larger than the sum of its proper divisors (2626637).

7879899 is a wasteful number, since it uses less digits than its factorization.

7879899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626636.

The product of its digits is 2286144, while the sum is 57.

The square root of 7879899 is about 2807.1157795859. The cubic root of 7879899 is about 198.9941077184.

It can be divided in two parts, 7879 and 899, that added together give a palindrome (8778).

The spelling of 7879899 in words is "seven million, eight hundred seventy-nine thousand, eight hundred ninety-nine".