8120172423 has 24 divisors (see below), whose sum is σ = 11906449408. Its totient is φ = 4918914000.

The previous prime is 8120172413. The next prime is 8120172427. The reversal of 8120172423 is 3242710218.

It is not a de Polignac number, because 8120172423 - 2¹² = 8120168327 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8120172427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 987258 + ... + 995448.

Almost surely, 2^8120172423 is an apocalyptic number.

8120172423 is a deficient number, since it is larger than the sum of its proper divisors (3786276985).

8120172423 is a wasteful number, since it uses less digits than its factorization.

8120172423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10947 (or 10936 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 8120172423 is about 90111.9993286133. Note that the first 3 decimals coincide. The cubic root of 8120172423 is about 2009.9646391146.

The spelling of 8120172423 in words is "eight billion, one hundred twenty million, one hundred seventy-two thousand, four hundred twenty-three".