140304613 has 4 divisors (see below), whose sum is σ = 142226668. Its totient is φ = 138382560.

The previous prime is 140304601. The next prime is 140304617. The reversal of 140304613 is 316403041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 316403041 = 3547 ⋅89203.

It can be written as a sum of positive squares in 2 ways, for example, as 71115489 + 69189124 = 8433^2 + 8318^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140304613 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 (140304617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960918 + ... + 961063.

It is an arithmetic number, because the mean of its divisors is an integer number (35556667).

Almost surely, 2^140304613 is an apocalyptic number.

It is an amenable number.

140304613 is a deficient number, since it is larger than the sum of its proper divisors (1922055).

140304613 is an equidigital number, since it uses as much as digits as its factorization.

140304613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922054.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 140304613 is about 11845.0248205734. The cubic root of 140304613 is about 519.6257329069.

Adding to 140304613 its reverse (316403041), we get a palindrome (456707654).

The spelling of 140304613 in words is "one hundred forty million, three hundred four thousand, six hundred thirteen".