68215923 has 24 divisors (see below), whose sum is σ = 101512320. Its totient is φ = 44115840.

The previous prime is 68215879. The next prime is 68215937. The reversal of 68215923 is 32951286.

68215923 is a `hidden beast` number, since 68 + 2 + 1 + 592 + 3 = 666.

It is not a de Polignac number, because 68215923 - 2¹⁸ = 67953779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68215943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81873 + ... + 82701.

It is an arithmetic number, because the mean of its divisors is an integer number (4229680).

Almost surely, 2^68215923 is an apocalyptic number.

68215923 is a deficient number, since it is larger than the sum of its proper divisors (33296397).

68215923 is a wasteful number, since it uses less digits than its factorization.

68215923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099 (or 1096 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 68215923 is about 8259.2931295602. The cubic root of 68215923 is about 408.5970749092.

The spelling of 68215923 in words is "sixty-eight million, two hundred fifteen thousand, nine hundred twenty-three".