210673139 has 4 divisors (see below), whose sum is σ = 217937760. Its totient is φ = 203408520.

The previous prime is 210673103. The next prime is 210673147. The reversal of 210673139 is 931376012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 210673139 - 2²⁰ = 209624563 is a prime.

It is a super-2 number, since 2×210673139² = 88766342992226642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210672139) 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 in 3 ways as a sum of consecutive naturals, for example, 3632267 + ... + 3632324.

It is an arithmetic number, because the mean of its divisors is an integer number (54484440).

Almost surely, 2^210673139 is an apocalyptic number.

210673139 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

210673139 is a deficient number, since it is larger than the sum of its proper divisors (7264621).

210673139 is an equidigital number, since it uses as much as digits as its factorization.

210673139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7264620.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 210673139 is about 14514.5836660925. The cubic root of 210673139 is about 595.0266108664.

The spelling of 210673139 in words is "two hundred ten million, six hundred seventy-three thousand, one hundred thirty-nine".