2115679873 has 4 divisors (see below), whose sum is σ = 2122354260. Its totient is φ = 2109005488.

The previous prime is 2115679831. The next prime is 2115679921. The reversal of 2115679873 is 3789765112.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1094749569 + 1020930304 = 33087^2 + 31952^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2115679873 is a prime.

It is a super-2 number, since 2×2115679873² = 8952202650034592258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115679073) 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, 3336718 + ... + 3337351.

It is an arithmetic number, because the mean of its divisors is an integer number (530588565).

Almost surely, 2^2115679873 is an apocalyptic number.

It is an amenable number.

2115679873 is a deficient number, since it is larger than the sum of its proper divisors (6674387).

2115679873 is an equidigital number, since it uses as much as digits as its factorization.

2115679873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6674386.

The product of its digits is 635040, while the sum is 49.

The square root of 2115679873 is about 45996.5202270780. The cubic root of 2115679873 is about 1283.7584586637.

The spelling of 2115679873 in words is "two billion, one hundred fifteen million, six hundred seventy-nine thousand, eight hundred seventy-three".