68991070 has 16 divisors (see below), whose sum is σ = 124703568. Its totient is φ = 27480960.

The previous prime is 68991047. The next prime is 68991073. The reversal of 68991070 is 7019986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68991073) 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 7 ways as a sum of consecutive naturals, for example, 11904 + ... + 16723.

It is an arithmetic number, because the mean of its divisors is an integer number (7793973).

Almost surely, 2^68991070 is an apocalyptic number.

68991070 is a deficient number, since it is larger than the sum of its proper divisors (55712498).

68991070 is a wasteful number, since it uses less digits than its factorization.

68991070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28875.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 68991070 is about 8306.0863226913. The cubic root of 68991070 is about 410.1388980118.

The spelling of 68991070 in words is "sixty-eight million, nine hundred ninety-one thousand, seventy".