8718393421 has 8 divisors (see below), whose sum is σ = 8747481600. Its totient is φ = 8689347120.

The previous prime is 8718393419. The next prime is 8718393461. The reversal of 8718393421 is 1243938178.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8718393421 - 2¹ = 8718393419 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 (8718393401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438075 + ... + 457543.

It is an arithmetic number, because the mean of its divisors is an integer number (1093435200).

Almost surely, 2^8718393421 is an apocalyptic number.

It is an amenable number.

8718393421 is a deficient number, since it is larger than the sum of its proper divisors (29088179).

8718393421 is a wasteful number, since it uses less digits than its factorization.

8718393421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20939.

The product of its digits is 290304, while the sum is 46.

The square root of 8718393421 is about 93372.3375577585. The cubic root of 8718393421 is about 2058.1585187526.

The spelling of 8718393421 in words is "eight billion, seven hundred eighteen million, three hundred ninety-three thousand, four hundred twenty-one".