198694497439 has 8 divisors (see below), whose sum is σ = 207344668032. Its totient is φ = 190045266840.

The previous prime is 198694497403. The next prime is 198694497467. The reversal of 198694497439 is 934794496891.

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 198694497439 - 2²⁷ = 198560279711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198694491439) 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, 215344 + ... + 666154.

It is an arithmetic number, because the mean of its divisors is an integer number (25918083504).

Almost surely, 2^198694497439 is an apocalyptic number.

198694497439 is a deficient number, since it is larger than the sum of its proper divisors (8650170593).

198694497439 is a wasteful number, since it uses less digits than its factorization.

198694497439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469997.

The product of its digits is 423263232, while the sum is 73.

The spelling of 198694497439 in words is "one hundred ninety-eight billion, six hundred ninety-four million, four hundred ninety-seven thousand, four hundred thirty-nine".