140394637 has 2 divisors, whose sum is σ = 140394638. Its totient is φ = 140394636.

The previous prime is 140394623. The next prime is 140394649. The reversal of 140394637 is 736493041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139499721 + 894916 = 11811^2 + 946^2 .

It is a cyclic number.

It is not a de Polignac number, because 140394637 - 2¹¹ = 140392589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140394596 and 140394605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140394697) 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, 70197318 + 70197319.

It is an arithmetic number, because the mean of its divisors is an integer number (70197319).

Almost surely, 2^140394637 is an apocalyptic number.

It is an amenable number.

140394637 is a deficient number, since it is larger than the sum of its proper divisors (1).

140394637 is an equidigital number, since it uses as much as digits as its factorization.

140394637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 140394637 is about 11848.8242876667. The cubic root of 140394637 is about 519.7368453990.

The spelling of 140394637 in words is "one hundred forty million, three hundred ninety-four thousand, six hundred thirty-seven".