2308921 has 4 divisors (see below), whose sum is σ = 2322000. Its totient is φ = 2295844.

The previous prime is 2308919. The next prime is 2308931. The reversal of 2308921 is 1298032.

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.

It is a cyclic number.

It is not a de Polignac number, because 2308921 - 2¹ = 2308919 is a prime.

It is a super-3 number, since 3×2308921³ = 36927378333701741883, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2308931) 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, 6271 + ... + 6628.

It is an arithmetic number, because the mean of its divisors is an integer number (580500).

2^2308921 is an apocalyptic number.

It is an amenable number.

2308921 is a deficient number, since it is larger than the sum of its proper divisors (13079).

2308921 is a wasteful number, since it uses less digits than its factorization.

2308921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13078.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2308921 is about 1519.5134089570. The cubic root of 2308921 is about 132.1710554035.

The spelling of 2308921 in words is "two million, three hundred eight thousand, nine hundred twenty-one".