930249921 has 4 divisors (see below), whose sum is σ = 1240333232. Its totient is φ = 620166612.

The previous prime is 930249889. The next prime is 930249961. The reversal of 930249921 is 129942039.

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 not a de Polignac number, because 930249921 - 2⁵ = 930249889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 930249921.

It is not an unprimeable number, because it can be changed into a prime (930249961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155041651 + ... + 155041656.

It is an arithmetic number, because the mean of its divisors is an integer number (310083308).

Almost surely, 2^930249921 is an apocalyptic number.

It is an amenable number.

930249921 is a deficient number, since it is larger than the sum of its proper divisors (310083311).

930249921 is a wasteful number, since it uses less digits than its factorization.

930249921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310083310.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 930249921 is about 30499.9987049180. The cubic root of 930249921 is about 976.1874363571.

The spelling of 930249921 in words is "nine hundred thirty million, two hundred forty-nine thousand, nine hundred twenty-one".