2384779921 has 4 divisors (see below), whose sum is σ = 2385785572. Its totient is φ = 2383774272.

The previous prime is 2384779913. The next prime is 2384779951. The reversal of 2384779921 is 1299774832.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 411643521 + 1973136400 = 20289^2 + 44420^2 .

It is a cyclic number.

It is not a de Polignac number, because 2384779921 - 2³ = 2384779913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2384779951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499260 + ... + 504013.

It is an arithmetic number, because the mean of its divisors is an integer number (596446393).

Almost surely, 2^2384779921 is an apocalyptic number.

It is an amenable number.

2384779921 is a deficient number, since it is larger than the sum of its proper divisors (1005651).

2384779921 is a wasteful number, since it uses less digits than its factorization.

2384779921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005650.

The product of its digits is 1524096, while the sum is 52.

The square root of 2384779921 is about 48834.2085120666. The cubic root of 2384779921 is about 1336.0296677364.

The spelling of 2384779921 in words is "two billion, three hundred eighty-four million, seven hundred seventy-nine thousand, nine hundred twenty-one".