208902472423 has 4 divisors (see below), whose sum is σ = 215641261888. Its totient is φ = 202163682960.

The previous prime is 208902472417. The next prime is 208902472447. The reversal of 208902472423 is 324274209802.

208902472423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 208902472423 - 2¹³ = 208902464231 is a prime.

It is the 457059-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 208902472423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208902472403) by changing a digit.

It is a nontrivial repunit in base 457058.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3369394686 + ... + 3369394747.

It is an arithmetic number, because the mean of its divisors is an integer number (53910315472).

Almost surely, 2^208902472423 is an apocalyptic number.

208902472423 is a deficient number, since it is larger than the sum of its proper divisors (6738789465).

208902472423 is an equidigital number, since it uses as much as digits as its factorization.

208902472423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6738789464.

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 208902472423 in words is "two hundred eight billion, nine hundred two million, four hundred seventy-two thousand, four hundred twenty-three".