140683538 has 6 divisors (see below), whose sum is σ = 211050471. Its totient is φ = 70333382.

The previous prime is 140683537. The next prime is 140683541. The reversal of 140683538 is 835386041.

It can be written as a sum of positive squares in only one way, i.e., 70341769 + 70341769 = 8387^2 + 8387^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8387.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140683537) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12581 + ... + 20967.

Almost surely, 2^140683538 is an apocalyptic number.

140683538 is a deficient number, since it is larger than the sum of its proper divisors (70366933).

140683538 is an frugal number, since it uses more digits than its factorization.

140683538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16776 (or 8389 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 140683538 is about 11861.0091476231. The cubic root of 140683538 is about 520.0931021660.

The spelling of 140683538 in words is "one hundred forty million, six hundred eighty-three thousand, five hundred thirty-eight".