9021387 has 4 divisors (see below), whose sum is σ = 12028520. Its totient is φ = 6014256.

The previous prime is 9021379. The next prime is 9021401. The reversal of 9021387 is 7831209.

It is a happy number.

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

It is not a de Polignac number, because 9021387 - 2³ = 9021379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9021317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1503562 + ... + 1503567.

It is an arithmetic number, because the mean of its divisors is an integer number (3007130).

Almost surely, 2^9021387 is an apocalyptic number.

9021387 is a deficient number, since it is larger than the sum of its proper divisors (3007133).

9021387 is a wasteful number, since it uses less digits than its factorization.

9021387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007132.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 9021387 is about 3003.5623849023. The cubic root of 9021387 is about 208.1730177153.

The spelling of 9021387 in words is "nine million, twenty-one thousand, three hundred eighty-seven".