10308921 has 16 divisors (see below), whose sum is σ = 15817728. Its totient is φ = 5850000.

The previous prime is 10308847. The next prime is 10308929. The reversal of 10308921 is 12980301.

10308921 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10308921 - 2¹⁰ = 10307897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10308891 and 10308900.

It is not an unprimeable number, because it can be changed into a prime (10308929) 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 15 ways as a sum of consecutive naturals, for example, 1546 + ... + 4796.

It is an arithmetic number, because the mean of its divisors is an integer number (988608).

Almost surely, 2^10308921 is an apocalyptic number.

It is an amenable number.

10308921 is a deficient number, since it is larger than the sum of its proper divisors (5508807).

10308921 is a wasteful number, since it uses less digits than its factorization.

10308921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 10308921 is about 3210.7508467647. The cubic root of 10308921 is about 217.6395088588.

The spelling of 10308921 in words is "ten million, three hundred eight thousand, nine hundred twenty-one".