440988139 has 2 divisors, whose sum is σ = 440988140. Its totient is φ = 440988138.

The previous prime is 440988137. The next prime is 440988151. The reversal of 440988139 is 931889044.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 440988139 - 2¹ = 440988137 is a prime.

Together with 440988137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (440988137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220494069 + 220494070.

It is an arithmetic number, because the mean of its divisors is an integer number (220494070).

Almost surely, 2^440988139 is an apocalyptic number.

440988139 is a deficient number, since it is larger than the sum of its proper divisors (1).

440988139 is an equidigital number, since it uses as much as digits as its factorization.

440988139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 440988139 is about 20999.7175933392. The cubic root of 440988139 is about 761.1594370098.

The spelling of 440988139 in words is "four hundred forty million, nine hundred eighty-eight thousand, one hundred thirty-nine".