140813021 has 2 divisors, whose sum is σ = 140813022. Its totient is φ = 140813020.

The previous prime is 140813017. The next prime is 140813033. The reversal of 140813021 is 120318041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83265625 + 57547396 = 9125^2 + 7586^2 .

It is an emirp because it is prime and its reverse (120318041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140813021 - 2² = 140813017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140812984 and 140813002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140813011) 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, 70406510 + 70406511.

It is an arithmetic number, because the mean of its divisors is an integer number (70406511).

Almost surely, 2^140813021 is an apocalyptic number.

It is an amenable number.

140813021 is a deficient number, since it is larger than the sum of its proper divisors (1).

140813021 is an equidigital number, since it uses as much as digits as its factorization.

140813021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 140813021 is about 11866.4662389441. The cubic root of 140813021 is about 520.2526151792.

The spelling of 140813021 in words is "one hundred forty million, eight hundred thirteen thousand, twenty-one".