978392984089 has 8 divisors (see below), whose sum is σ = 981827661672. Its totient is φ = 974962053120.

The previous prime is 978392984059. The next prime is 978392984113. The reversal of 978392984089 is 980489293879.

It can be written as a sum of positive squares in 4 ways, for example, as 403214840064 + 575178144025 = 634992^2 + 758405^2 .

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 978392984089 - 2⁵ = 978392984057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978392984029) 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, 412944 + ... + 1458529.

It is an arithmetic number, because the mean of its divisors is an integer number (122728457709).

Almost surely, 2^978392984089 is an apocalyptic number.

It is an amenable number.

978392984089 is a deficient number, since it is larger than the sum of its proper divisors (3434677583).

978392984089 is a wasteful number, since it uses less digits than its factorization.

978392984089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873307.

The product of its (nonzero) digits is 564350976, while the sum is 76.

The spelling of 978392984089 in words is "nine hundred seventy-eight billion, three hundred ninety-two million, nine hundred eighty-four thousand, eighty-nine".