140445813 has 8 divisors (see below), whose sum is σ = 190794528. Its totient is φ = 91863824.

The previous prime is 140445803. The next prime is 140445817. The reversal of 140445813 is 318544041.

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 140445813 - 2¹⁸ = 140183669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140445817) 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 7 ways as a sum of consecutive naturals, for example, 441495 + ... + 441812.

It is an arithmetic number, because the mean of its divisors is an integer number (23849316).

Almost surely, 2^140445813 is an apocalyptic number.

It is an amenable number.

140445813 is a deficient number, since it is larger than the sum of its proper divisors (50348715).

140445813 is an equidigital number, since it uses as much as digits as its factorization.

140445813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883363.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 140445813 is about 11850.9836300621. The cubic root of 140445813 is about 519.7999884132.

Adding to 140445813 its reverse (318544041), we get a palindrome (458989854).

The spelling of 140445813 in words is "one hundred forty million, four hundred forty-five thousand, eight hundred thirteen".