978693997799 has 8 divisors (see below), whose sum is σ = 1137465179520. Its totient is φ = 824662254456.

The previous prime is 978693997783. The next prime is 978693997823. The reversal of 978693997799 is 997799396879.

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 978693997799 - 2⁴ = 978693997783 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 (978693957799) 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, 1184859149 + ... + 1184859974.

It is an arithmetic number, because the mean of its divisors is an integer number (142183147440).

Almost surely, 2^978693997799 is an apocalyptic number.

978693997799 is a deficient number, since it is larger than the sum of its proper divisors (158771181721).

978693997799 is a wasteful number, since it uses less digits than its factorization.

978693997799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369719189.

The product of its digits is 26248933872, while the sum is 92.

The spelling of 978693997799 in words is "nine hundred seventy-eight billion, six hundred ninety-three million, nine hundred ninety-seven thousand, seven hundred ninety-nine".