9213905 has 4 divisors (see below), whose sum is σ = 11056692. Its totient is φ = 7371120.

The previous prime is 9213871. The next prime is 9213923. The reversal of 9213905 is 5093129.

9213905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5093129 = 83 ⋅61363.

It can be written as a sum of positive squares in 2 ways, for example, as 4343056 + 4870849 = 2084^2 + 2207^2 .

It is not a de Polignac number, because 9213905 - 2²⁰ = 8165329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921386 + ... + 921395.

It is an arithmetic number, because the mean of its divisors is an integer number (2764173).

Almost surely, 2^9213905 is an apocalyptic number.

It is an amenable number.

9213905 is a deficient number, since it is larger than the sum of its proper divisors (1842787).

9213905 is a wasteful number, since it uses less digits than its factorization.

9213905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842786.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 9213905 is about 3035.4414835407. The cubic root of 9213905 is about 209.6434236047.

The spelling of 9213905 in words is "nine million, two hundred thirteen thousand, nine hundred five".