208425839 has 16 divisors (see below), whose sum is σ = 233280000. Its totient is φ = 185286816.

The previous prime is 208425827. The next prime is 208425857. The reversal of 208425839 is 938524802.

It is a cyclic number.

It is not a de Polignac number, because 208425839 - 2⁴ = 208425823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208425796 and 208425805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208425869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18662 + ... + 27660.

It is an arithmetic number, because the mean of its divisors is an integer number (14580000).

Almost surely, 2^208425839 is an apocalyptic number.

208425839 is a deficient number, since it is larger than the sum of its proper divisors (24854161).

208425839 is a wasteful number, since it uses less digits than its factorization.

208425839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9094.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 208425839 is about 14436.9608643925. The cubic root of 208425839 is about 592.9032798413.

The spelling of 208425839 in words is "two hundred eight million, four hundred twenty-five thousand, eight hundred thirty-nine".