208748421 has 56 divisors (see below), whose sum is σ = 376691520. Its totient is φ = 112954176.

The previous prime is 208748411. The next prime is 208748429. The reversal of 208748421 is 124847802.

It is not a de Polignac number, because 208748421 - 2⁶ = 208748357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208748429) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 95881 + ... + 98033.

Almost surely, 2^208748421 is an apocalyptic number.

208748421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

208748421 is a deficient number, since it is larger than the sum of its proper divisors (167943099).

208748421 is an equidigital number, since it uses as much as digits as its factorization.

208748421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197 (or 2182 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 208748421 is about 14448.1286331483. The cubic root of 208748421 is about 593.2090022349.

The spelling of 208748421 in words is "two hundred eight million, seven hundred forty-eight thousand, four hundred twenty-one".