440451139 has 2 divisors, whose sum is σ = 440451140. Its totient is φ = 440451138.

The previous prime is 440451083. The next prime is 440451169. The reversal of 440451139 is 931154044.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 440451139 - 2¹¹ = 440449091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 440451139.

It is not a weakly prime, because it can be changed into another prime (440451169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220225569 + 220225570.

It is an arithmetic number, because the mean of its divisors is an integer number (220225570).

Almost surely, 2^440451139 is an apocalyptic number.

440451139 is a deficient number, since it is larger than the sum of its proper divisors (1).

440451139 is an equidigital number, since it uses as much as digits as its factorization.

440451139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 440451139 is about 20986.9278123312. The cubic root of 440451139 is about 760.8503518704.

The spelling of 440451139 in words is "four hundred forty million, four hundred fifty-one thousand, one hundred thirty-nine".