140661139 has 2 divisors, whose sum is σ = 140661140. Its totient is φ = 140661138.

The previous prime is 140661137. The next prime is 140661163. The reversal of 140661139 is 931166041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140661139 - 2¹ = 140661137 is a prime.

Together with 140661137, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 140661139.

It is not a weakly prime, because it can be changed into another prime (140661137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70330569 + 70330570.

It is an arithmetic number, because the mean of its divisors is an integer number (70330570).

Almost surely, 2^140661139 is an apocalyptic number.

140661139 is a deficient number, since it is larger than the sum of its proper divisors (1).

140661139 is an equidigital number, since it uses as much as digits as its factorization.

140661139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 140661139 is about 11860.0648817787. The cubic root of 140661139 is about 520.0654984064.

The spelling of 140661139 in words is "one hundred forty million, six hundred sixty-one thousand, one hundred thirty-nine".