208191949 has 12 divisors (see below), whose sum is σ = 251118624. Its totient is φ = 169056072.

The previous prime is 208191937. The next prime is 208191953. The reversal of 208191949 is 949191802.

It is a happy number.

It is not a de Polignac number, because 208191949 - 2⁵ = 208191917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208191959) 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 in 11 ways as a sum of consecutive naturals, for example, 38667 + ... + 43720.

It is an arithmetic number, because the mean of its divisors is an integer number (20926552).

Almost surely, 2^208191949 is an apocalyptic number.

It is an amenable number.

208191949 is a deficient number, since it is larger than the sum of its proper divisors (42926675).

208191949 is an equidigital number, since it uses as much as digits as its factorization.

208191949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82432 (or 82413 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 208191949 is about 14428.8582015349. The cubic root of 208191949 is about 592.6814166703.

The spelling of 208191949 in words is "two hundred eight million, one hundred ninety-one thousand, nine hundred forty-nine".