9912426523 has 4 divisors (see below), whose sum is σ = 9912680008. Its totient is φ = 9912173040.

The previous prime is 9912426509. The next prime is 9912426527. The reversal of 9912426523 is 3256242199.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9912426523 - 2²¹ = 9910329371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9912426523.

It is not an unprimeable number, because it can be changed into a prime (9912426527) 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, 54273 + ... + 150898.

It is an arithmetic number, because the mean of its divisors is an integer number (2478170002).

Almost surely, 2^9912426523 is an apocalyptic number.

9912426523 is a deficient number, since it is larger than the sum of its proper divisors (253485).

9912426523 is a wasteful number, since it uses less digits than its factorization.

9912426523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253484.

The product of its digits is 233280, while the sum is 43.

The square root of 9912426523 is about 99561.1697550807. The cubic root of 9912426523 is about 2148.1271971805.

The spelling of 9912426523 in words is "nine billion, nine hundred twelve million, four hundred twenty-six thousand, five hundred twenty-three".