4249383921 has 12 divisors (see below), whose sum is σ = 6146117172. Its totient is φ = 2829175776.

The previous prime is 4249383913. The next prime is 4249383923. The reversal of 4249383921 is 1293839424.

4249383921 is a `hidden beast` number, since 4 + 249 + 383 + 9 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1876622400 + 2372761521 = 43320^2 + 48711^2 .

It is not a de Polignac number, because 4249383921 - 2³ = 4249383913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4249383923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305046 + ... + 318671.

It is an arithmetic number, because the mean of its divisors is an integer number (512176431).

Almost surely, 2^4249383921 is an apocalyptic number.

It is an amenable number.

4249383921 is a deficient number, since it is larger than the sum of its proper divisors (1896733251).

4249383921 is a wasteful number, since it uses less digits than its factorization.

4249383921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624480 (or 624477 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 4249383921 is about 65187.2987705427. The cubic root of 4249383921 is about 1619.7276279624.

The spelling of 4249383921 in words is "four billion, two hundred forty-nine million, three hundred eighty-three thousand, nine hundred twenty-one".