8123961919 has 8 divisors (see below), whose sum is σ = 8319240000. Its totient is φ = 7930995072.

The previous prime is 8123961889. The next prime is 8123961947. The reversal of 8123961919 is 9191693218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8123961919 is a prime.

It is a super-2 number, since 2×8123961919² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8123961619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570694 + ... + 584755.

It is an arithmetic number, because the mean of its divisors is an integer number (1039905000).

Almost surely, 2^8123961919 is an apocalyptic number.

8123961919 is a gapful number since it is divisible by the number (89) formed by its first and last digit.

8123961919 is a deficient number, since it is larger than the sum of its proper divisors (195278081).

8123961919 is a wasteful number, since it uses less digits than its factorization.

8123961919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155617.

The product of its digits is 209952, while the sum is 49.

The square root of 8123961919 is about 90133.0234653204. The cubic root of 8123961919 is about 2010.2772584374.

The spelling of 8123961919 in words is "eight billion, one hundred twenty-three million, nine hundred sixty-one thousand, nine hundred nineteen".