140243653 has 16 divisors (see below), whose sum is σ = 157768704. Its totient is φ = 123543360.

The previous prime is 140243647. The next prime is 140243699. The reversal of 140243653 is 356342041.

It is a cyclic number.

It is not a de Polignac number, because 140243653 - 2²¹ = 138146501 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 (140243603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128476 + ... + 129562.

It is an arithmetic number, because the mean of its divisors is an integer number (9860544).

Almost surely, 2^140243653 is an apocalyptic number.

It is an amenable number.

140243653 is a deficient number, since it is larger than the sum of its proper divisors (17525051).

140243653 is a wasteful number, since it uses less digits than its factorization.

140243653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 140243653 is about 11842.4513087452. The cubic root of 140243653 is about 519.5504657846.

Adding to 140243653 its reverse (356342041), we get a palindrome (496585694).

The spelling of 140243653 in words is "one hundred forty million, two hundred forty-three thousand, six hundred fifty-three".