84729775989 has 8 divisors (see below), whose sum is σ = 113049014400. Its totient is φ = 56448527456.

The previous prime is 84729775987. The next prime is 84729775993. The reversal of 84729775989 is 98957792748.

It is a happy number.

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 84729775989 - 2¹ = 84729775987 is a prime.

It is a super-2 number, since 2×84729775989² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84729775989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84729775987) 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, 9492264 + ... + 9501185.

It is an arithmetic number, because the mean of its divisors is an integer number (14131126800).

Almost surely, 2^84729775989 is an apocalyptic number.

It is an amenable number.

84729775989 is a deficient number, since it is larger than the sum of its proper divisors (28319238411).

84729775989 is a wasteful number, since it uses less digits than its factorization.

84729775989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18994939.

The product of its digits is 640120320, while the sum is 75.

The spelling of 84729775989 in words is "eighty-four billion, seven hundred twenty-nine million, seven hundred seventy-five thousand, nine hundred eighty-nine".