68805994 has 4 divisors (see below), whose sum is σ = 103208994. Its totient is φ = 34402996.

The previous prime is 68805991. The next prime is 68806033. The reversal of 68805994 is 49950886.

It is a happy number.

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., 68145025 + 660969 = 8255^2 + 813^2 .

It is not an unprimeable number, because it can be changed into a prime (68805991) 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 as a sum of consecutive naturals, namely, 17201497 + ... + 17201500.

Almost surely, 2^68805994 is an apocalyptic number.

68805994 is a deficient number, since it is larger than the sum of its proper divisors (34403000).

68805994 is a wasteful number, since it uses less digits than its factorization.

68805994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34402999.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 68805994 is about 8294.9378538962. The cubic root of 68805994 is about 409.7718222721.

The spelling of 68805994 in words is "sixty-eight million, eight hundred five thousand, nine hundred ninety-four".