9388421 has 4 divisors (see below), whose sum is σ = 10729632. Its totient is φ = 8047212.

The previous prime is 9388409. The next prime is 9388427. The reversal of 9388421 is 1248839.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 1248839 = 53 ⋅23563.

It is a cyclic number.

It is not a de Polignac number, because 9388421 - 2²² = 5194117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9388427) 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, 670595 + ... + 670608.

It is an arithmetic number, because the mean of its divisors is an integer number (2682408).

Almost surely, 2^9388421 is an apocalyptic number.

It is an amenable number.

9388421 is a deficient number, since it is larger than the sum of its proper divisors (1341211).

9388421 is a wasteful number, since it uses less digits than its factorization.

9388421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341210.

The product of its digits is 13824, while the sum is 35.

The square root of 9388421 is about 3064.0530347891. The cubic root of 9388421 is about 210.9587379915.

The spelling of 9388421 in words is "nine million, three hundred eighty-eight thousand, four hundred twenty-one".