68281623 has 40 divisors (see below), whose sum is σ = 107053056. Its totient is φ = 43318800.

The previous prime is 68281607. The next prime is 68281627. The reversal of 68281623 is 32618286.

68281623 is a `hidden beast` number, since 6 + 8 + 28 + 1 + 623 = 666.

It is not a de Polignac number, because 68281623 - 2⁴ = 68281607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68281627) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 178090 + ... + 178472.

Almost surely, 2^68281623 is an apocalyptic number.

68281623 is a deficient number, since it is larger than the sum of its proper divisors (38771433).

68281623 is a wasteful number, since it uses less digits than its factorization.

68281623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 488 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 68281623 is about 8263.2695103089. The cubic root of 68281623 is about 408.7282085849.

The spelling of 68281623 in words is "sixty-eight million, two hundred eighty-one thousand, six hundred twenty-three".