210140039 has 2 divisors, whose sum is σ = 210140040. Its totient is φ = 210140038.

The previous prime is 210140023. The next prime is 210140083. The reversal of 210140039 is 930041012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210140039 - 2⁴ = 210140023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210140039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210140639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105070019 + 105070020.

It is an arithmetic number, because the mean of its divisors is an integer number (105070020).

Almost surely, 2^210140039 is an apocalyptic number.

210140039 is a deficient number, since it is larger than the sum of its proper divisors (1).

210140039 is an equidigital number, since it uses as much as digits as its factorization.

210140039 is an odious number, because the sum of its binary digits is odd.

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

The square root of 210140039 is about 14496.2077454761. The cubic root of 210140039 is about 594.5242898683.

The spelling of 210140039 in words is "two hundred ten million, one hundred forty thousand, thirty-nine".