2179990799 has 4 divisors (see below), whose sum is σ = 2491418064. Its totient is φ = 1868563536.

The previous prime is 2179990739. The next prime is 2179990837. The reversal of 2179990799 is 9970999712.

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

It is not a de Polignac number, because 2179990799 - 2¹² = 2179986703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2179990739) 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, 155713622 + ... + 155713635.

It is an arithmetic number, because the mean of its divisors is an integer number (622854516).

Almost surely, 2^2179990799 is an apocalyptic number.

2179990799 is a deficient number, since it is larger than the sum of its proper divisors (311427265).

2179990799 is an equidigital number, since it uses as much as digits as its factorization.

2179990799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311427264.

The product of its (nonzero) digits is 5786802, while the sum is 62.

The square root of 2179990799 is about 46690.3715877267. The cubic root of 2179990799 is about 1296.6364327562.

The spelling of 2179990799 in words is "two billion, one hundred seventy-nine million, nine hundred ninety thousand, seven hundred ninety-nine".