4380287921 has 4 divisors (see below), whose sum is σ = 4380427632. Its totient is φ = 4380148212.

The previous prime is 4380287909. The next prime is 4380287929. The reversal of 4380287921 is 1297820834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4380287921 - 2¹⁴ = 4380271537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4380287929) 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, 1406 + ... + 93608.

It is an arithmetic number, because the mean of its divisors is an integer number (1095106908).

Almost surely, 2^4380287921 is an apocalyptic number.

It is an amenable number.

4380287921 is a deficient number, since it is larger than the sum of its proper divisors (139711).

4380287921 is an equidigital number, since it uses as much as digits as its factorization.

4380287921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139710.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 4380287921 is about 66183.7436308947. The cubic root of 4380287921 is about 1636.1918284687.

The spelling of 4380287921 in words is "four billion, three hundred eighty million, two hundred eighty-seven thousand, nine hundred twenty-one".