140705381 has 2 divisors, whose sum is σ = 140705382. Its totient is φ = 140705380.

The previous prime is 140705371. The next prime is 140705449. The reversal of 140705381 is 183507041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96216481 + 44488900 = 9809^2 + 6670^2 .

It is a cyclic number.

It is not a de Polignac number, because 140705381 - 2¹⁰ = 140704357 is a prime.

It is a super-2 number, since 2×140705381² = 39596008484710322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140705371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70352690 + 70352691.

It is an arithmetic number, because the mean of its divisors is an integer number (70352691).

Almost surely, 2^140705381 is an apocalyptic number.

It is an amenable number.

140705381 is a deficient number, since it is larger than the sum of its proper divisors (1).

140705381 is an equidigital number, since it uses as much as digits as its factorization.

140705381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 140705381 is about 11861.9299020016. The cubic root of 140705381 is about 520.1200179087.

The spelling of 140705381 in words is "one hundred forty million, seven hundred five thousand, three hundred eighty-one".