140252779 has 4 divisors (see below), whose sum is σ = 141092784. Its totient is φ = 139412776.

The previous prime is 140252767. The next prime is 140252789. The reversal of 140252779 is 977252041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140252779 - 2²¹ = 138155627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140252789) 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 in 3 ways as a sum of consecutive naturals, for example, 419752 + ... + 420085.

It is an arithmetic number, because the mean of its divisors is an integer number (35273196).

Almost surely, 2^140252779 is an apocalyptic number.

140252779 is a deficient number, since it is larger than the sum of its proper divisors (840005).

140252779 is an equidigital number, since it uses as much as digits as its factorization.

140252779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840004.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 140252779 is about 11842.8366112178. The cubic root of 140252779 is about 519.5617350164.

The spelling of 140252779 in words is "one hundred forty million, two hundred fifty-two thousand, seven hundred seventy-nine".