100002139 has 2 divisors, whose sum is σ = 100002140. Its totient is φ = 100002138.

The previous prime is 100002127. The next prime is 100002163. The reversal of 100002139 is 931200001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100002139 - 2⁷ = 100002011 is a prime.

It is not a weakly prime, because it can be changed into another prime (100002169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50001069 + 50001070.

It is an arithmetic number, because the mean of its divisors is an integer number (50001070).

Almost surely, 2^100002139 is an apocalyptic number.

100002139 is a deficient number, since it is larger than the sum of its proper divisors (1).

100002139 is an equidigital number, since it uses as much as digits as its factorization.

100002139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 100002139 is about 10000.1069494281. The cubic root of 100002139 is about 464.1621927905.

The spelling of 100002139 in words is "one hundred million, two thousand, one hundred thirty-nine".