140079689 has 4 divisors (see below), whose sum is σ = 142722756. Its totient is φ = 137436624.

The previous prime is 140079673. The next prime is 140079703. The reversal of 140079689 is 986970041.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34339600 + 105740089 = 5860^2 + 10283^2 .

It is a cyclic number.

It is not a de Polignac number, because 140079689 - 2⁴ = 140079673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140079089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321454 + ... + 1321559.

It is an arithmetic number, because the mean of its divisors is an integer number (35680689).

Almost surely, 2^140079689 is an apocalyptic number.

It is an amenable number.

140079689 is a deficient number, since it is larger than the sum of its proper divisors (2643067).

140079689 is an equidigital number, since it uses as much as digits as its factorization.

140079689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643066.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 140079689 is about 11835.5265620081. The cubic root of 140079689 is about 519.3479116560.

The spelling of 140079689 in words is "one hundred forty million, seventy-nine thousand, six hundred eighty-nine".