68824457 has 8 divisors (see below), whose sum is σ = 74397960. Its totient is φ = 63290880.

The previous prime is 68824447. The next prime is 68824463. The reversal of 68824457 is 75442886.

It can be written as a sum of positive squares in 4 ways, for example, as 4648336 + 64176121 = 2156^2 + 8011^2 .

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-68824457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68824447) 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 7 ways as a sum of consecutive naturals, for example, 6344 + ... + 13337.

It is an arithmetic number, because the mean of its divisors is an integer number (9299745).

Almost surely, 2^68824457 is an apocalyptic number.

It is an amenable number.

68824457 is a deficient number, since it is larger than the sum of its proper divisors (5573503).

68824457 is a wasteful number, since it uses less digits than its factorization.

68824457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19963.

The product of its digits is 430080, while the sum is 44.

The square root of 68824457 is about 8296.0506869233. The cubic root of 68824457 is about 409.8084709230.

The spelling of 68824457 in words is "sixty-eight million, eight hundred twenty-four thousand, four hundred fifty-seven".