978768869 has 8 divisors (see below), whose sum is σ = 1109535840. Its totient is φ = 855927216.

The previous prime is 978768853. The next prime is 978768893. The reversal of 978768869 is 968867879.

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 978768869 - 2⁴ = 978768853 is a prime.

It is a super-2 number, since 2×978768869² = 1915976997847078322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 978768799 and 978768808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978768809) 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, 1981067 + ... + 1981560.

It is an arithmetic number, because the mean of its divisors is an integer number (138691980).

Almost surely, 2^978768869 is an apocalyptic number.

It is an amenable number.

978768869 is a deficient number, since it is larger than the sum of its proper divisors (130766971).

978768869 is a wasteful number, since it uses less digits than its factorization.

978768869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3962659.

The product of its digits is 73156608, while the sum is 68.

The square root of 978768869 is about 31285.2819869024. The cubic root of 978768869 is about 992.8722725415.

The spelling of 978768869 in words is "nine hundred seventy-eight million, seven hundred sixty-eight thousand, eight hundred sixty-nine".