8401384559 has 4 divisors (see below), whose sum is σ = 8410428960. Its totient is φ = 8392340160.

The previous prime is 8401384553. The next prime is 8401384567. The reversal of 8401384559 is 9554831048.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 8401384559 - 2⁴ = 8401384543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8401384553) 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, 4520807 + ... + 4522664.

It is an arithmetic number, because the mean of its divisors is an integer number (2102607240).

Almost surely, 2^8401384559 is an apocalyptic number.

8401384559 is a deficient number, since it is larger than the sum of its proper divisors (9044401).

8401384559 is an equidigital number, since it uses as much as digits as its factorization.

8401384559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9044400.

The product of its (nonzero) digits is 691200, while the sum is 47.

The square root of 8401384559 is about 91659.0669764863. The cubic root of 8401384559 is about 2032.9043948529.

The spelling of 8401384559 in words is "eight billion, four hundred one million, three hundred eighty-four thousand, five hundred fifty-nine".