140720013 has 18 divisors (see below), whose sum is σ = 236448654. Its totient is φ = 80411184.

The previous prime is 140720011. The next prime is 140720029. The reversal of 140720013 is 310027041.

140720013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 139287204 + 1432809 = 11802^2 + 1197^2 .

It is not a de Polignac number, because 140720013 - 2¹ = 140720011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140720011) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 159106 + ... + 159987.

Almost surely, 2^140720013 is an apocalyptic number.

It is an amenable number.

140720013 is a deficient number, since it is larger than the sum of its proper divisors (95728641).

140720013 is a wasteful number, since it uses less digits than its factorization.

140720013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319113 (or 319103 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 140720013 is about 11862.5466490126. The cubic root of 140720013 is about 520.1380464358.

Adding to 140720013 its reverse (310027041), we get a palindrome (450747054).

The spelling of 140720013 in words is "one hundred forty million, seven hundred twenty thousand, thirteen".