1650213689 has 4 divisors (see below), whose sum is σ = 1650573300. Its totient is φ = 1649854080.

The previous prime is 1650213667. The next prime is 1650213701. The reversal of 1650213689 is 9863120561.

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 1468422400 + 181791289 = 38320^2 + 13483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1650213689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1650213659) 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, 172832 + ... + 182129.

It is an arithmetic number, because the mean of its divisors is an integer number (412643325).

Almost surely, 2^1650213689 is an apocalyptic number.

It is an amenable number.

1650213689 is a deficient number, since it is larger than the sum of its proper divisors (359611).

1650213689 is an equidigital number, since it uses as much as digits as its factorization.

1650213689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359610.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1650213689 is about 40622.8222677844. The cubic root of 1650213689 is about 1181.7167601791.

The spelling of 1650213689 in words is "one billion, six hundred fifty million, two hundred thirteen thousand, six hundred eighty-nine".