440140087 has 2 divisors, whose sum is σ = 440140088. Its totient is φ = 440140086.

The previous prime is 440140079. The next prime is 440140091. The reversal of 440140087 is 780041044.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 440140087 - 2³ = 440140079 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440140097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220070043 + 220070044.

It is an arithmetic number, because the mean of its divisors is an integer number (220070044).

Almost surely, 2^440140087 is an apocalyptic number.

440140087 is a deficient number, since it is larger than the sum of its proper divisors (1).

440140087 is an equidigital number, since it uses as much as digits as its factorization.

440140087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 440140087 is about 20979.5158905061. The cubic root of 440140087 is about 760.6712024058.

The spelling of 440140087 in words is "four hundred forty million, one hundred forty thousand, eighty-seven".