68117458 has 4 divisors (see below), whose sum is σ = 102176190. Its totient is φ = 34058728.

The previous prime is 68117437. The next prime is 68117551. The reversal of 68117458 is 85471186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 51739249 + 16378209 = 7193^2 + 4047^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 68117458.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 17029363 + ... + 17029366.

Almost surely, 2^68117458 is an apocalyptic number.

68117458 is a deficient number, since it is larger than the sum of its proper divisors (34058732).

68117458 is a wasteful number, since it uses less digits than its factorization.

68117458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34058731.

The product of its digits is 53760, while the sum is 40.

The square root of 68117458 is about 8253.3301157775. The cubic root of 68117458 is about 408.4003863045.

The spelling of 68117458 in words is "sixty-eight million, one hundred seventeen thousand, four hundred fifty-eight".