140591639 has 8 divisors (see below), whose sum is σ = 145685760. Its totient is φ = 135580536.

The previous prime is 140591629. The next prime is 140591653. The reversal of 140591639 is 936195041.

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

It is a cyclic number.

It is not a de Polignac number, because 140591639 - 2⁸ = 140591383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140591629) 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, 17297 + ... + 24090.

It is an arithmetic number, because the mean of its divisors is an integer number (18210720).

Almost surely, 2^140591639 is an apocalyptic number.

140591639 is a deficient number, since it is larger than the sum of its proper divisors (5094121).

140591639 is an equidigital number, since it uses as much as digits as its factorization.

140591639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41509.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 140591639 is about 11857.1345189299. The cubic root of 140591639 is about 519.9798303321.

The spelling of 140591639 in words is "one hundred forty million, five hundred ninety-one thousand, six hundred thirty-nine".