4401997639 has 4 divisors (see below), whose sum is σ = 4740612856. Its totient is φ = 4063382424.

The previous prime is 4401997549. The next prime is 4401997693. The reversal of 4401997639 is 9367991044.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4401997639 - 2¹³ = 4401989447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4401997339) 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, 169307589 + ... + 169307614.

It is an arithmetic number, because the mean of its divisors is an integer number (1185153214).

Almost surely, 2^4401997639 is an apocalyptic number.

4401997639 is a deficient number, since it is larger than the sum of its proper divisors (338615217).

4401997639 is a wasteful number, since it uses less digits than its factorization.

4401997639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338615216.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 4401997639 is about 66347.5518689273. The cubic root of 4401997639 is about 1638.8904897608.

The spelling of 4401997639 in words is "four billion, four hundred one million, nine hundred ninety-seven thousand, six hundred thirty-nine".