140067679 has 4 divisors (see below), whose sum is σ = 140850360. Its totient is φ = 139285000.

The previous prime is 140067649. The next prime is 140067713. The reversal of 140067679 is 976760041.

140067679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976760041 = 17 ⋅57456473.

It is a cyclic number.

It is not a de Polignac number, because 140067679 - 2¹⁷ = 139936607 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140067649) 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, 391072 + ... + 391429.

It is an arithmetic number, because the mean of its divisors is an integer number (35212590).

Almost surely, 2^140067679 is an apocalyptic number.

140067679 is a deficient number, since it is larger than the sum of its proper divisors (782681).

140067679 is an equidigital number, since it uses as much as digits as its factorization.

140067679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782680.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 140067679 is about 11835.0191803816. The cubic root of 140067679 is about 519.3330688030. Note that the first 3 decimals are identical.

The spelling of 140067679 in words is "one hundred forty million, sixty-seven thousand, six hundred seventy-nine".