140205613 has 8 divisors (see below), whose sum is σ = 148927032. Its totient is φ = 131536896.

The previous prime is 140205589. The next prime is 140205619. The reversal of 140205613 is 316502041.

It can be written as a sum of positive squares in 4 ways, for example, as 21548164 + 118657449 = 4642^2 + 10893^2 .

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 140205613 - 2⁵ = 140205581 is a prime.

It is a super-2 number, since 2×140205613² = 39315227833411538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140205619) 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, 7620 + ... + 18397.

It is an arithmetic number, because the mean of its divisors is an integer number (18615879).

Almost surely, 2^140205613 is an apocalyptic number.

It is an amenable number.

140205613 is a deficient number, since it is larger than the sum of its proper divisors (8721419).

140205613 is a wasteful number, since it uses less digits than its factorization.

140205613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26351.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 140205613 is about 11840.8451134199. The cubic root of 140205613 is about 519.5034868626.

Adding to 140205613 its reverse (316502041), we get a palindrome (456707654).

The spelling of 140205613 in words is "one hundred forty million, two hundred five thousand, six hundred thirteen".