140561329 has 2 divisors, whose sum is σ = 140561330. Its totient is φ = 140561328.

The previous prime is 140561269. The next prime is 140561359. The reversal of 140561329 is 923165041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83905600 + 56655729 = 9160^2 + 7527^2 .

It is a cyclic number.

It is not a de Polignac number, because 140561329 - 2²¹ = 138464177 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140561329.

It is not a weakly prime, because it can be changed into another prime (140561359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70280664 + 70280665.

It is an arithmetic number, because the mean of its divisors is an integer number (70280665).

Almost surely, 2^140561329 is an apocalyptic number.

It is an amenable number.

140561329 is a deficient number, since it is larger than the sum of its proper divisors (1).

140561329 is an equidigital number, since it uses as much as digits as its factorization.

140561329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 140561329 is about 11855.8563166057. The cubic root of 140561329 is about 519.9424603493.

The spelling of 140561329 in words is "one hundred forty million, five hundred sixty-one thousand, three hundred twenty-nine".