100240139 has 2 divisors, whose sum is σ = 100240140. Its totient is φ = 100240138.

The previous prime is 100240117. The next prime is 100240159. The reversal of 100240139 is 931042001.

It is an a-pointer prime, because the next prime (100240159) can be obtained adding 100240139 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100240139 - 2⁸ = 100239883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100240139.

It is not a weakly prime, because it can be changed into another prime (100240159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50120069 + 50120070.

It is an arithmetic number, because the mean of its divisors is an integer number (50120070).

Almost surely, 2^100240139 is an apocalyptic number.

100240139 is a deficient number, since it is larger than the sum of its proper divisors (1).

100240139 is an equidigital number, since it uses as much as digits as its factorization.

100240139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 100240139 is about 10011.9997502996. Note that the first 3 decimals coincide. The cubic root of 100240139 is about 464.5301285185.

The spelling of 100240139 in words is "one hundred million, two hundred forty thousand, one hundred thirty-nine".