140639501 has 8 divisors (see below), whose sum is σ = 148987680. Its totient is φ = 132385968.

The previous prime is 140639431. The next prime is 140639509. The reversal of 140639501 is 105936041.

140639501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140639501 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 (140639509) 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, 20591 + ... + 26556.

It is an arithmetic number, because the mean of its divisors is an integer number (18623460).

Almost surely, 2^140639501 is an apocalyptic number.

It is an amenable number.

140639501 is a deficient number, since it is larger than the sum of its proper divisors (8348179).

140639501 is a wasteful number, since it uses less digits than its factorization.

140639501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47323.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 140639501 is about 11859.1526257149. The cubic root of 140639501 is about 520.0388296941.

The spelling of 140639501 in words is "one hundred forty million, six hundred thirty-nine thousand, five hundred one".