9358721 has 4 divisors (see below), whose sum is σ = 9909252. Its totient is φ = 8808192.

The previous prime is 9358709. The next prime is 9358747. The reversal of 9358721 is 1278539.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1278539 = 103 ⋅12413.

It can be written as a sum of positive squares in 2 ways, for example, as 2676496 + 6682225 = 1636^2 + 2585^2 .

It is a cyclic number.

It is not a de Polignac number, because 9358721 - 2²² = 5164417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9358751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275240 + ... + 275273.

It is an arithmetic number, because the mean of its divisors is an integer number (2477313).

Almost surely, 2^9358721 is an apocalyptic number.

It is an amenable number.

9358721 is a deficient number, since it is larger than the sum of its proper divisors (550531).

9358721 is a wasteful number, since it uses less digits than its factorization.

9358721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550530.

The product of its digits is 15120, while the sum is 35.

The square root of 9358721 is about 3059.2026739005. The cubic root of 9358721 is about 210.7360490346.

The spelling of 9358721 in words is "nine million, three hundred fifty-eight thousand, seven hundred twenty-one".