1930790842 has 4 divisors (see below), whose sum is σ = 2896186266. Its totient is φ = 965395420.

The previous prime is 1930790837. The next prime is 1930790863. The reversal of 1930790842 is 2480970391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2480970391 = 19 ⋅130577389.

It can be written as a sum of positive squares in only one way, i.e., 1925542161 + 5248681 = 43881^2 + 2291^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 482697709 + ... + 482697712.

Almost surely, 2^1930790842 is an apocalyptic number.

1930790842 is a deficient number, since it is larger than the sum of its proper divisors (965395424).

1930790842 is an equidigital number, since it uses as much as digits as its factorization.

1930790842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965395423.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 1930790842 is about 43940.7651503703. The cubic root of 1930790842 is about 1245.2171020783.

The spelling of 1930790842 in words is "one billion, nine hundred thirty million, seven hundred ninety thousand, eight hundred forty-two".