217435734139 has 8 divisors (see below), whose sum is σ = 235870770240. Its totient is φ = 199244870976.

The previous prime is 217435734079. The next prime is 217435734143. The reversal of 217435734139 is 931437534712.

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

It is a cyclic number.

It is not a de Polignac number, because 217435734139 - 2²⁹ = 216898863227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 217435734092 and 217435734101.

It is not an unprimeable number, because it can be changed into a prime (217435734169) 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, 61041379 + ... + 61044940.

It is an arithmetic number, because the mean of its divisors is an integer number (29483846280).

Almost surely, 2^217435734139 is an apocalyptic number.

217435734139 is a deficient number, since it is larger than the sum of its proper divisors (18435036101).

217435734139 is a wasteful number, since it uses less digits than its factorization.

217435734139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122086469.

The product of its digits is 1905120, while the sum is 49.

The spelling of 217435734139 in words is "two hundred seventeen billion, four hundred thirty-five million, seven hundred thirty-four thousand, one hundred thirty-nine".