140440879 has 2 divisors, whose sum is σ = 140440880. Its totient is φ = 140440878.

The previous prime is 140440873. The next prime is 140440901. The reversal of 140440879 is 978044041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140440879 - 2³ = 140440871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140440871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70220439 + 70220440.

It is an arithmetic number, because the mean of its divisors is an integer number (70220440).

Almost surely, 2^140440879 is an apocalyptic number.

140440879 is a deficient number, since it is larger than the sum of its proper divisors (1).

140440879 is an equidigital number, since it uses as much as digits as its factorization.

140440879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 140440879 is about 11850.7754598592. The cubic root of 140440879 is about 519.7939013131.

The spelling of 140440879 in words is "one hundred forty million, four hundred forty thousand, eight hundred seventy-nine".