100438139 has 2 divisors, whose sum is σ = 100438140. Its totient is φ = 100438138.

The previous prime is 100438133. The next prime is 100438181. The reversal of 100438139 is 931834001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100438139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100438133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50219069 + 50219070.

It is an arithmetic number, because the mean of its divisors is an integer number (50219070).

Almost surely, 2^100438139 is an apocalyptic number.

100438139 is a deficient number, since it is larger than the sum of its proper divisors (1).

100438139 is an equidigital number, since it uses as much as digits as its factorization.

100438139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 100438139 is about 10021.8830067009. The cubic root of 100438139 is about 464.8357827649.

The spelling of 100438139 in words is "one hundred million, four hundred thirty-eight thousand, one hundred thirty-nine".