1930408219 has 4 divisors (see below), whose sum is σ = 1936240600. Its totient is φ = 1924575840.

The previous prime is 1930408211. The next prime is 1930408237. The reversal of 1930408219 is 9128040391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9128040391 = 59 ⋅154712549.

It is a cyclic number.

It is not a de Polignac number, because 1930408219 - 2³ = 1930408211 is a prime.

It is a super-2 number, since 2×1930408219² = 7452951783965503922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1930408211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2915694 + ... + 2916355.

It is an arithmetic number, because the mean of its divisors is an integer number (484060150).

Almost surely, 2^1930408219 is an apocalyptic number.

1930408219 is a deficient number, since it is larger than the sum of its proper divisors (5832381).

1930408219 is an equidigital number, since it uses as much as digits as its factorization.

1930408219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5832380.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1930408219 is about 43936.4110846573. The cubic root of 1930408219 is about 1245.1348421448.

The spelling of 1930408219 in words is "one billion, nine hundred thirty million, four hundred eight thousand, two hundred nineteen".