9778923 has 48 divisors (see below), whose sum is σ = 17911296. Its totient is φ = 4993920.

The previous prime is 9778913. The next prime is 9778943. The reversal of 9778923 is 3298779.

It is not a de Polignac number, because 9778923 - 2⁵ = 9778891 is a prime.

It is a d-powerful number, because it can be written as 9² + 7⁴ + 7⁷ + 8⁵ + 9² + 2²³ + 3¹² .

It is not an unprimeable number, because it can be changed into a prime (9778913) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71311 + ... + 71447.

It is an arithmetic number, because the mean of its divisors is an integer number (373152).

Almost surely, 2^9778923 is an apocalyptic number.

9778923 is a deficient number, since it is larger than the sum of its proper divisors (8132373).

9778923 is a wasteful number, since it uses less digits than its factorization.

9778923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 261 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 9778923 is about 3127.1269561692. The cubic root of 9778923 is about 213.8439701729.

It can be divided in two parts, 9778 and 923, that added together give a palindrome (10701).

The spelling of 9778923 in words is "nine million, seven hundred seventy-eight thousand, nine hundred twenty-three".