140268637 has 4 divisors (see below), whose sum is σ = 140298556. Its totient is φ = 140238720.

The previous prime is 140268631. The next prime is 140268647. The reversal of 140268637 is 736862041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 736862041 = 181 ⋅4071061.

It can be written as a sum of positive squares in 2 ways, for example, as 117094041 + 23174596 = 10821^2 + 4814^2 .

It is a cyclic number.

It is not a de Polignac number, because 140268637 - 2³ = 140268629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140268596 and 140268605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140268631) 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, 6228 + ... + 17869.

It is an arithmetic number, because the mean of its divisors is an integer number (35074639).

Almost surely, 2^140268637 is an apocalyptic number.

It is an amenable number.

140268637 is a deficient number, since it is larger than the sum of its proper divisors (29919).

140268637 is an equidigital number, since it uses as much as digits as its factorization.

140268637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29918.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 140268637 is about 11843.5061109454. The cubic root of 140268637 is about 519.5813160889.

The spelling of 140268637 in words is "one hundred forty million, two hundred sixty-eight thousand, six hundred thirty-seven".