210020039 has 2 divisors, whose sum is σ = 210020040. Its totient is φ = 210020038.

The previous prime is 210020003. The next prime is 210020047. The reversal of 210020039 is 930020012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210020039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210019999 and 210020026.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210020539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010019 + 105010020.

It is an arithmetic number, because the mean of its divisors is an integer number (105010020).

Almost surely, 2^210020039 is an apocalyptic number.

210020039 is a deficient number, since it is larger than the sum of its proper divisors (1).

210020039 is an equidigital number, since it uses as much as digits as its factorization.

210020039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 210020039 is about 14492.0681408831. The cubic root of 210020039 is about 594.4111010642.

The spelling of 210020039 in words is "two hundred ten million, twenty thousand, thirty-nine".