140268639 has 8 divisors (see below), whose sum is σ = 213742720. Its totient is φ = 80153496.

The previous prime is 140268631. The next prime is 140268647. The reversal of 140268639 is 936862041.

140268639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (140268631) and next prime (140268647).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140268639 - 2³ = 140268631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140268597 and 140268606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140268631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3339709 + ... + 3339750.

It is an arithmetic number, because the mean of its divisors is an integer number (26717840).

Almost surely, 2^140268639 is an apocalyptic number.

140268639 is a deficient number, since it is larger than the sum of its proper divisors (73474081).

140268639 is an equidigital number, since it uses as much as digits as its factorization.

140268639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6679469.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 140268639 is about 11843.5061953798. The cubic root of 140268639 is about 519.5813185583.

The spelling of 140268639 in words is "one hundred forty million, two hundred sixty-eight thousand, six hundred thirty-nine".