2001000139 has 2 divisors, whose sum is σ = 2001000140. Its totient is φ = 2001000138.

The previous prime is 2001000101. The next prime is 2001000151. The reversal of 2001000139 is 9310001002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001000139 - 2¹⁷ = 2000869067 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001007139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000500069 + 1000500070.

It is an arithmetic number, because the mean of its divisors is an integer number (1000500070).

Almost surely, 2^2001000139 is an apocalyptic number.

2001000139 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001000139 is an equidigital number, since it uses as much as digits as its factorization.

2001000139 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 2001000139 is about 44732.5400463689. The cubic root of 2001000139 is about 1260.1310309269.

The spelling of 2001000139 in words is "two billion, one million, one hundred thirty-nine", and thus it is an aban number.