208484139 has 16 divisors (see below), whose sum is σ = 290140704. Its totient is φ = 133036800.

The previous prime is 208484123. The next prime is 208484147. The reversal of 208484139 is 931484802.

It is not a de Polignac number, because 208484139 - 2⁴ = 208484123 is a prime.

It is a super-3 number, since 3×208484139³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 208484097 and 208484106.

It is not an unprimeable number, because it can be changed into a prime (208485139) 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, 9472 + ... + 22509.

It is an arithmetic number, because the mean of its divisors is an integer number (18133794).

Almost surely, 2^208484139 is an apocalyptic number.

208484139 is a deficient number, since it is larger than the sum of its proper divisors (81656565).

208484139 is a wasteful number, since it uses less digits than its factorization.

208484139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32078.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 208484139 is about 14438.9798462357. The cubic root of 208484139 is about 592.9585561592.

The spelling of 208484139 in words is "two hundred eight million, four hundred eighty-four thousand, one hundred thirty-nine".