1000020139 has 2 divisors, whose sum is σ = 1000020140. Its totient is φ = 1000020138.

The previous prime is 1000020107. The next prime is 1000020163. The reversal of 1000020139 is 9310200001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1000020139 - 2⁵ = 1000020107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000023139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500010069 + 500010070.

It is an arithmetic number, because the mean of its divisors is an integer number (500010070).

Almost surely, 2^1000020139 is an apocalyptic number.

1000020139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000020139 is an equidigital number, since it uses as much as digits as its factorization.

1000020139 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1000020139 is about 31623.0950256296. The cubic root of 1000020139 is about 1000.0067129549.

The spelling of 1000020139 in words is "one billion, twenty thousand, one hundred thirty-nine".