140344653 has 4 divisors (see below), whose sum is σ = 187126208. Its totient is φ = 93563100.

The previous prime is 140344649. The next prime is 140344727. The reversal of 140344653 is 356443041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 356443041 = 3 ⋅118814347.

It is not a de Polignac number, because 140344653 - 2² = 140344649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140344653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140344553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23390773 + ... + 23390778.

It is an arithmetic number, because the mean of its divisors is an integer number (46781552).

Almost surely, 2^140344653 is an apocalyptic number.

It is an amenable number.

140344653 is a deficient number, since it is larger than the sum of its proper divisors (46781555).

140344653 is an equidigital number, since it uses as much as digits as its factorization.

140344653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46781554.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 140344653 is about 11846.7148610912. The cubic root of 140344653 is about 519.6751583084.

Adding to 140344653 its reverse (356443041), we get a palindrome (496787694).

It can be divided in two parts, 1403 and 44653, that added together give a triangular number (46056 = T₃₀₃).

The spelling of 140344653 in words is "one hundred forty million, three hundred forty-four thousand, six hundred fifty-three".