140520493 has 2 divisors, whose sum is σ = 140520494. Its totient is φ = 140520492.

The previous prime is 140520481. The next prime is 140520529. The reversal of 140520493 is 394025041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136118889 + 4401604 = 11667^2 + 2098^2 .

It is an emirp because it is prime and its reverse (394025041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140520493 - 2²⁵ = 106966061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140520433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70260246 + 70260247.

It is an arithmetic number, because the mean of its divisors is an integer number (70260247).

Almost surely, 2^140520493 is an apocalyptic number.

It is an amenable number.

140520493 is a deficient number, since it is larger than the sum of its proper divisors (1).

140520493 is an equidigital number, since it uses as much as digits as its factorization.

140520493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 140520493 is about 11854.1340046416. The cubic root of 140520493 is about 519.8921040933.

The spelling of 140520493 in words is "one hundred forty million, five hundred twenty thousand, four hundred ninety-three".