140688682 has 4 divisors (see below), whose sum is σ = 211033026. Its totient is φ = 70344340.

The previous prime is 140688661. The next prime is 140688767. The reversal of 140688682 is 286886041.

140688682 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 286886041 = 13 ⋅22068157.

It can be written as a sum of positive squares in only one way, i.e., 82791801 + 57896881 = 9099^2 + 7609^2 .

It is an unprimeable number.

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, 35172169 + ... + 35172172.

Almost surely, 2^140688682 is an apocalyptic number.

140688682 is a deficient number, since it is larger than the sum of its proper divisors (70344344).

140688682 is an equidigital number, since it uses as much as digits as its factorization.

140688682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70344343.

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 140688682 is about 11861.2259905964. The cubic root of 140688682 is about 520.0994410416.

The spelling of 140688682 in words is "one hundred forty million, six hundred eighty-eight thousand, six hundred eighty-two".