8129965423 has 4 divisors (see below), whose sum is σ = 8557858360. Its totient is φ = 7702072488.

The previous prime is 8129965421. The next prime is 8129965429. The reversal of 8129965423 is 3245699218.

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 8129965423 - 2¹ = 8129965421 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 (8129965421) 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, 213946440 + ... + 213946477.

It is an arithmetic number, because the mean of its divisors is an integer number (2139464590).

Almost surely, 2^8129965423 is an apocalyptic number.

8129965423 is a deficient number, since it is larger than the sum of its proper divisors (427892937).

8129965423 is a wasteful number, since it uses less digits than its factorization.

8129965423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427892936.

The product of its digits is 933120, while the sum is 49.

The square root of 8129965423 is about 90166.3208908958. The cubic root of 8129965423 is about 2010.7723262393.

The spelling of 8129965423 in words is "eight billion, one hundred twenty-nine million, nine hundred sixty-five thousand, four hundred twenty-three".