978123283 has 4 divisors (see below), whose sum is σ = 978315640. Its totient is φ = 977930928.

The previous prime is 978123247. The next prime is 978123317. The reversal of 978123283 is 382321879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 382321879 = 163 ⋅2345533.

It is a cyclic number.

It is not a de Polignac number, because 978123283 - 2²⁵ = 944568851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978123233) 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, 88338 + ... + 98791.

It is an arithmetic number, because the mean of its divisors is an integer number (244578910).

Almost surely, 2^978123283 is an apocalyptic number.

978123283 is a deficient number, since it is larger than the sum of its proper divisors (192357).

978123283 is a wasteful number, since it uses less digits than its factorization.

978123283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192356.

The product of its digits is 145152, while the sum is 43.

The square root of 978123283 is about 31274.9625579312. The cubic root of 978123283 is about 992.6539283747.

The spelling of 978123283 in words is "nine hundred seventy-eight million, one hundred twenty-three thousand, two hundred eighty-three".