440440129 has 2 divisors, whose sum is σ = 440440130. Its totient is φ = 440440128.

The previous prime is 440440127. The next prime is 440440153. The reversal of 440440129 is 921044044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244859904 + 195580225 = 15648^2 + 13985^2 .

It is a cyclic number.

It is not a de Polignac number, because 440440129 - 2¹ = 440440127 is a prime.

Together with 440440127, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 440440097 and 440440106.

It is not a weakly prime, because it can be changed into another prime (440440127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220220064 + 220220065.

It is an arithmetic number, because the mean of its divisors is an integer number (220220065).

Almost surely, 2^440440129 is an apocalyptic number.

It is an amenable number.

440440129 is a deficient number, since it is larger than the sum of its proper divisors (1).

440440129 is an equidigital number, since it uses as much as digits as its factorization.

440440129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 440440129 is about 20986.6655045531. The cubic root of 440440129 is about 760.8440121341.

The spelling of 440440129 in words is "four hundred forty million, four hundred forty thousand, one hundred twenty-nine".