978488867 has 4 divisors (see below), whose sum is σ = 1010053056. Its totient is φ = 946924680.

The previous prime is 978488851. The next prime is 978488869. The reversal of 978488867 is 768884879.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768884879 = 7 ⋅109840697.

It is a cyclic number.

It is not a de Polignac number, because 978488867 - 2⁴ = 978488851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978488869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15782048 + ... + 15782109.

It is an arithmetic number, because the mean of its divisors is an integer number (252513264).

Almost surely, 2^978488867 is an apocalyptic number.

978488867 is a deficient number, since it is larger than the sum of its proper divisors (31564189).

978488867 is a wasteful number, since it uses less digits than its factorization.

978488867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31564188.

The product of its digits is 43352064, while the sum is 65.

The square root of 978488867 is about 31280.8066871684. The cubic root of 978488867 is about 992.7775846312. Note that the first 3 decimals are identical.

The spelling of 978488867 in words is "nine hundred seventy-eight million, four hundred eighty-eight thousand, eight hundred sixty-seven".