140406223493 has 2 divisors, whose sum is σ = 140406223494. Its totient is φ = 140406223492.

The previous prime is 140406223487. The next prime is 140406223547. The reversal of 140406223493 is 394322604041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85484894884 + 54921328609 = 292378^2 + 234353^2 .

It is an emirp because it is prime and its reverse (394322604041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140406223493 - 2²² = 140402029189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140406223423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70203111746 + 70203111747.

It is an arithmetic number, because the mean of its divisors is an integer number (70203111747).

Almost surely, 2^140406223493 is an apocalyptic number.

It is an amenable number.

140406223493 is a deficient number, since it is larger than the sum of its proper divisors (1).

140406223493 is an equidigital number, since it uses as much as digits as its factorization.

140406223493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 140406223493 in words is "one hundred forty billion, four hundred six million, two hundred twenty-three thousand, four hundred ninety-three".