208029947 has 12 divisors (see below), whose sum is σ = 217356048. Its totient is φ = 198957600.

The previous prime is 208029919. The next prime is 208029961. The reversal of 208029947 is 749920802.

It is not a de Polignac number, because 208029947 - 2¹⁴ = 208013563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208029967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136922 + ... + 138432.

It is an arithmetic number, because the mean of its divisors is an integer number (18113004).

Almost surely, 2^208029947 is an apocalyptic number.

208029947 is a deficient number, since it is larger than the sum of its proper divisors (9326101).

208029947 is an equidigital number, since it uses as much as digits as its factorization.

208029947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 208029947 is about 14423.2432899123. The cubic root of 208029947 is about 592.5276475316.

The spelling of 208029947 in words is "two hundred eight million, twenty-nine thousand, nine hundred forty-seven".