1650130409 has 4 divisors (see below), whose sum is σ = 1652822916. Its totient is φ = 1647437904.

The previous prime is 1650130397. The next prime is 1650130429. The reversal of 1650130409 is 9040310561.

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 624850009 + 1025280400 = 24997^2 + 32020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1650130409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1650130429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1345334 + ... + 1346559.

It is an arithmetic number, because the mean of its divisors is an integer number (413205729).

Almost surely, 2^1650130409 is an apocalyptic number.

It is an amenable number.

1650130409 is a deficient number, since it is larger than the sum of its proper divisors (2692507).

1650130409 is an equidigital number, since it uses as much as digits as its factorization.

1650130409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692506.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 1650130409 is about 40621.7972152882. The cubic root of 1650130409 is about 1181.6968809300.

The spelling of 1650130409 in words is "one billion, six hundred fifty million, one hundred thirty thousand, four hundred nine".