140818637 has 2 divisors, whose sum is σ = 140818638. Its totient is φ = 140818636.

The previous prime is 140818607. The next prime is 140818649. The reversal of 140818637 is 736818041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104264521 + 36554116 = 10211^2 + 6046^2 .

It is a cyclic number.

It is not a de Polignac number, because 140818637 - 2¹⁶ = 140753101 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140818637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140818607) 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 as a sum of consecutive naturals, namely, 70409318 + 70409319.

It is an arithmetic number, because the mean of its divisors is an integer number (70409319).

Almost surely, 2^140818637 is an apocalyptic number.

It is an amenable number.

140818637 is a deficient number, since it is larger than the sum of its proper divisors (1).

140818637 is an equidigital number, since it uses as much as digits as its factorization.

140818637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 140818637 is about 11866.7028697950. The cubic root of 140818637 is about 520.2595314426.

The spelling of 140818637 in words is "one hundred forty million, eight hundred eighteen thousand, six hundred thirty-seven".