978448123 has 4 divisors (see below), whose sum is σ = 978940080. Its totient is φ = 977956168.

The previous prime is 978448117. The next prime is 978448169. The reversal of 978448123 is 321844879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321844879 = 6427 ⋅50077.

It is a cyclic number.

It is not a de Polignac number, because 978448123 - 2⁹ = 978447611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978448103) 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, 242983 + ... + 246976.

It is an arithmetic number, because the mean of its divisors is an integer number (244735020).

Almost surely, 2^978448123 is an apocalyptic number.

978448123 is a deficient number, since it is larger than the sum of its proper divisors (491957).

978448123 is a wasteful number, since it uses less digits than its factorization.

978448123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491956.

The product of its digits is 387072, while the sum is 46.

The square root of 978448123 is about 31280.1554184118. The cubic root of 978448123 is about 992.7638047806.

The spelling of 978448123 in words is "nine hundred seventy-eight million, four hundred forty-eight thousand, one hundred twenty-three".