2170630765 has 4 divisors (see below), whose sum is σ = 2604756924. Its totient is φ = 1736504608.

The previous prime is 2170630747. The next prime is 2170630793. The reversal of 2170630765 is 5670360712.

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 703893961 + 1466736804 = 26531^2 + 38298^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2170630765 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 217063072 + ... + 217063081.

It is an arithmetic number, because the mean of its divisors is an integer number (651189231).

Almost surely, 2^2170630765 is an apocalyptic number.

It is an amenable number.

2170630765 is a deficient number, since it is larger than the sum of its proper divisors (434126159).

2170630765 is an equidigital number, since it uses as much as digits as its factorization.

2170630765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434126158.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 2170630765 is about 46590.0286005493. The cubic root of 2170630765 is about 1294.7780193251.

The spelling of 2170630765 in words is "two billion, one hundred seventy million, six hundred thirty thousand, seven hundred sixty-five".