1930212809 has 8 divisors (see below), whose sum is σ = 2211517248. Its totient is φ = 1650298320.

The previous prime is 1930212787. The next prime is 1930212811. The reversal of 1930212809 is 9082120391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1930212809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1930212859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344507 + ... + 350064.

It is an arithmetic number, because the mean of its divisors is an integer number (276439656).

Almost surely, 2^1930212809 is an apocalyptic number.

It is an amenable number.

1930212809 is a deficient number, since it is larger than the sum of its proper divisors (281304439).

1930212809 is an equidigital number, since it uses as much as digits as its factorization.

1930212809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694975.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1930212809 is about 43934.1872463802. The cubic root of 1930212809 is about 1245.0928268502.

The spelling of 1930212809 in words is "one billion, nine hundred thirty million, two hundred twelve thousand, eight hundred nine".