140306689 has 2 divisors, whose sum is σ = 140306690. Its totient is φ = 140306688.

The previous prime is 140306599. The next prime is 140306707. The reversal of 140306689 is 986603041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84953089 + 55353600 = 9217^2 + 7440^2 .

It is a cyclic number.

It is not a de Polignac number, because 140306689 - 2¹⁵ = 140273921 is a prime.

It is not a weakly prime, because it can be changed into another prime (140306989) 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, 70153344 + 70153345.

It is an arithmetic number, because the mean of its divisors is an integer number (70153345).

Almost surely, 2^140306689 is an apocalyptic number.

It is an amenable number.

140306689 is a deficient number, since it is larger than the sum of its proper divisors (1).

140306689 is an equidigital number, since it uses as much as digits as its factorization.

140306689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 140306689 is about 11845.1124519778. The cubic root of 140306689 is about 519.6282957538.

The spelling of 140306689 in words is "one hundred forty million, three hundred six thousand, six hundred eighty-nine".