4249921839 has 8 divisors (see below), whose sum is σ = 5670550272. Its totient is φ = 2831287320.

The previous prime is 4249921801. The next prime is 4249921849. The reversal of 4249921839 is 9381299424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4249921839 - 2¹² = 4249917743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4249921791 and 4249921800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4249921849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 493497 + ... + 502034.

It is an arithmetic number, because the mean of its divisors is an integer number (708818784).

Almost surely, 2^4249921839 is an apocalyptic number.

4249921839 is a deficient number, since it is larger than the sum of its proper divisors (1420628433).

4249921839 is a wasteful number, since it uses less digits than its factorization.

4249921839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996957.

The product of its digits is 1119744, while the sum is 51.

The square root of 4249921839 is about 65191.4245817654. The cubic root of 4249921839 is about 1619.7959707230.

The spelling of 4249921839 in words is "four billion, two hundred forty-nine million, nine hundred twenty-one thousand, eight hundred thirty-nine".