100782139 has 2 divisors, whose sum is σ = 100782140. Its totient is φ = 100782138.

The previous prime is 100782133. The next prime is 100782161. The reversal of 100782139 is 931287001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100782139 - 2¹⁵ = 100749371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100782139.

It is not a weakly prime, because it can be changed into another prime (100782133) 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, 50391069 + 50391070.

It is an arithmetic number, because the mean of its divisors is an integer number (50391070).

Almost surely, 2^100782139 is an apocalyptic number.

100782139 is a deficient number, since it is larger than the sum of its proper divisors (1).

100782139 is an equidigital number, since it uses as much as digits as its factorization.

100782139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 100782139 is about 10039.0307799110. The cubic root of 100782139 is about 465.3658646019.

The spelling of 100782139 in words is "one hundred million, seven hundred eighty-two thousand, one hundred thirty-nine".