208920123417 has 8 divisors (see below), whose sum is σ = 278562424096. Its totient is φ = 139278952512.

The previous prime is 208920123359. The next prime is 208920123463. The reversal of 208920123417 is 714321029802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 208920123417 - 2⁶ = 208920123353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208920123917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353778 + ... + 736884.

It is an arithmetic number, because the mean of its divisors is an integer number (34820303012).

Almost surely, 2^208920123417 is an apocalyptic number.

It is an amenable number.

208920123417 is a deficient number, since it is larger than the sum of its proper divisors (69642300679).

208920123417 is a wasteful number, since it uses less digits than its factorization.

208920123417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564887.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 208920123417 in words is "two hundred eight billion, nine hundred twenty million, one hundred twenty-three thousand, four hundred seventeen".