140305493 has 2 divisors, whose sum is σ = 140305494. Its totient is φ = 140305492.

The previous prime is 140305427. The next prime is 140305507. The reversal of 140305493 is 394503041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137405284 + 2900209 = 11722^2 + 1703^2 .

It is an emirp because it is prime and its reverse (394503041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140305493 - 2⁸ = 140305237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140305093) 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 as a sum of consecutive naturals, namely, 70152746 + 70152747.

It is an arithmetic number, because the mean of its divisors is an integer number (70152747).

Almost surely, 2^140305493 is an apocalyptic number.

It is an amenable number.

140305493 is a deficient number, since it is larger than the sum of its proper divisors (1).

140305493 is an equidigital number, since it uses as much as digits as its factorization.

140305493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 140305493 is about 11845.0619669126. The cubic root of 140305493 is about 519.6268192805.

The spelling of 140305493 in words is "one hundred forty million, three hundred five thousand, four hundred ninety-three".