1923984047 has 4 divisors (see below), whose sum is σ = 1943033496. Its totient is φ = 1904934600.

The previous prime is 1923984037. The next prime is 1923984079. The reversal of 1923984047 is 7404893291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7404893291 = 211 ⋅35094281.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1923984047 is a prime.

It is a super-2 number, since 2×1923984047² = 7403429226220996418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1923983992 and 1923984010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1923984037) 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, 9524573 + ... + 9524774.

It is an arithmetic number, because the mean of its divisors is an integer number (485758374).

Almost surely, 2^1923984047 is an apocalyptic number.

1923984047 is a deficient number, since it is larger than the sum of its proper divisors (19049449).

1923984047 is a wasteful number, since it uses less digits than its factorization.

1923984047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19049448.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 1923984047 is about 43863.2425499985. The cubic root of 1923984047 is about 1243.7520862502.

The spelling of 1923984047 in words is "one billion, nine hundred twenty-three million, nine hundred eighty-four thousand, forty-seven".