100402139 has 2 divisors, whose sum is σ = 100402140. Its totient is φ = 100402138.

The previous prime is 100402123. The next prime is 100402151. The reversal of 100402139 is 931204001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100402139 - 2⁴ = 100402123 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100402139.

It is not a weakly prime, because it can be changed into another prime (100402339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50201069 + 50201070.

It is an arithmetic number, because the mean of its divisors is an integer number (50201070).

Almost surely, 2^100402139 is an apocalyptic number.

100402139 is a deficient number, since it is larger than the sum of its proper divisors (1).

100402139 is an equidigital number, since it uses as much as digits as its factorization.

100402139 is an evil number, because the sum of its binary digits is even.

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

The square root of 100402139 is about 10020.0867760714. The cubic root of 100402139 is about 464.7802391634.

The spelling of 100402139 in words is "one hundred million, four hundred two thousand, one hundred thirty-nine".