8732123405 has 4 divisors (see below), whose sum is σ = 10478548092. Its totient is φ = 6985698720.

The previous prime is 8732123401. The next prime is 8732123429. The reversal of 8732123405 is 5043212378.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5043212378 = 2 ⋅2521606189.

It can be written as a sum of positive squares in 2 ways, for example, as 6690258436 + 2041864969 = 81794^2 + 45187^2 .

It is not a de Polignac number, because 8732123405 - 2² = 8732123401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8732123401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873212336 + ... + 873212345.

It is an arithmetic number, because the mean of its divisors is an integer number (2619637023).

Almost surely, 2^8732123405 is an apocalyptic number.

It is an amenable number.

8732123405 is a deficient number, since it is larger than the sum of its proper divisors (1746424687).

8732123405 is a wasteful number, since it uses less digits than its factorization.

8732123405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746424686.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 8732123405 is about 93445.8313944501. The cubic root of 8732123405 is about 2059.2383684082.

The spelling of 8732123405 in words is "eight billion, seven hundred thirty-two million, one hundred twenty-three thousand, four hundred five".