140068637 has 4 divisors (see below), whose sum is σ = 144898620. Its totient is φ = 135238656.

The previous prime is 140068631. The next prime is 140068667. The reversal of 140068637 is 736860041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33339076 + 106729561 = 5774^2 + 10331^2 .

It is a cyclic number.

It is not a de Polignac number, because 140068637 - 2⁶ = 140068573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140068597 and 140068606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140068631) 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 in 3 ways as a sum of consecutive naturals, for example, 2414948 + ... + 2415005.

It is an arithmetic number, because the mean of its divisors is an integer number (36224655).

Almost surely, 2^140068637 is an apocalyptic number.

It is an amenable number.

140068637 is a deficient number, since it is larger than the sum of its proper divisors (4829983).

140068637 is an equidigital number, since it uses as much as digits as its factorization.

140068637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4829982.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 140068637 is about 11835.0596534196. The cubic root of 140068637 is about 519.3342528019.

The spelling of 140068637 in words is "one hundred forty million, sixty-eight thousand, six hundred thirty-seven".