2120650817 has 4 divisors (see below), whose sum is σ = 2121157680. Its totient is φ = 2120143956.

The previous prime is 2120650813. The next prime is 2120650837. The reversal of 2120650817 is 7180560212.

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 2120650817 - 2² = 2120650813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120650813) 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, 247103 + ... + 255540.

It is an arithmetic number, because the mean of its divisors is an integer number (530289420).

Almost surely, 2^2120650817 is an apocalyptic number.

It is an amenable number.

2120650817 is a deficient number, since it is larger than the sum of its proper divisors (506863).

2120650817 is an equidigital number, since it uses as much as digits as its factorization.

2120650817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506862.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 2120650817 is about 46050.5246115612. The cubic root of 2120650817 is about 1284.7631002569.

The spelling of 2120650817 in words is "two billion, one hundred twenty million, six hundred fifty thousand, eight hundred seventeen".