1930839745 has 4 divisors (see below), whose sum is σ = 2317007700. Its totient is φ = 1544671792.

The previous prime is 1930839739. The next prime is 1930839791. The reversal of 1930839745 is 5479380391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5479380391 = 101 ⋅54251291.

It can be written as a sum of positive squares in 2 ways, for example, as 298356529 + 1632483216 = 17273^2 + 40404^2 .

It is a cyclic number.

It is not a de Polignac number, because 1930839745 - 2³ = 1930839737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193083970 + ... + 193083979.

It is an arithmetic number, because the mean of its divisors is an integer number (579251925).

Almost surely, 2^1930839745 is an apocalyptic number.

It is an amenable number.

1930839745 is a deficient number, since it is larger than the sum of its proper divisors (386167955).

1930839745 is an equidigital number, since it uses as much as digits as its factorization.

1930839745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386167954.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 1930839745 is about 43941.3216118951. The cubic root of 1930839745 is about 1245.2276149273.

The spelling of 1930839745 in words is "one billion, nine hundred thirty million, eight hundred thirty-nine thousand, seven hundred forty-five".