68253939 has 12 divisors (see below), whose sum is σ = 106172976. Its totient is φ = 42002352.

The previous prime is 68253931. The next prime is 68253959. The reversal of 68253939 is 93935286.

68253939 is a `hidden beast` number, since 6 + 82 + 539 + 39 = 666.

It is not a de Polignac number, because 68253939 - 2³ = 68253931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68253894 and 68253903.

It is not an unprimeable number, because it can be changed into a prime (68253931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 291567 + ... + 291800.

It is an arithmetic number, because the mean of its divisors is an integer number (8847748).

Almost surely, 2^68253939 is an apocalyptic number.

68253939 is a deficient number, since it is larger than the sum of its proper divisors (37919037).

68253939 is a wasteful number, since it uses less digits than its factorization.

68253939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583386 (or 583383 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 68253939 is about 8261.5942166146. The cubic root of 68253939 is about 408.6729630651.

The spelling of 68253939 in words is "sixty-eight million, two hundred fifty-three thousand, nine hundred thirty-nine".