140406529 has 2 divisors, whose sum is σ = 140406530. Its totient is φ = 140406528.

The previous prime is 140406517. The next prime is 140406551. The reversal of 140406529 is 925604041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135675904 + 4730625 = 11648^2 + 2175^2 .

It is a cyclic number.

It is not a de Polignac number, because 140406529 - 2⁷ = 140406401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140406529.

It is not a weakly prime, because it can be changed into another prime (140406569) 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, 70203264 + 70203265.

It is an arithmetic number, because the mean of its divisors is an integer number (70203265).

Almost surely, 2^140406529 is an apocalyptic number.

It is an amenable number.

140406529 is a deficient number, since it is larger than the sum of its proper divisors (1).

140406529 is an equidigital number, since it uses as much as digits as its factorization.

140406529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 140406529 is about 11849.3260989813. The cubic root of 140406529 is about 519.7515195969.

The spelling of 140406529 in words is "one hundred forty million, four hundred six thousand, five hundred twenty-nine".