68988021 has 8 divisors (see below), whose sum is σ = 92451744. Its totient is φ = 45758160.

The previous prime is 68988019. The next prime is 68988037. The reversal of 68988021 is 12088986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68988021 - 2¹ = 68988019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68988001) 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, 57775 + ... + 58956.

It is an arithmetic number, because the mean of its divisors is an integer number (11556468).

Almost surely, 2^68988021 is an apocalyptic number.

It is an amenable number.

68988021 is a deficient number, since it is larger than the sum of its proper divisors (23463723).

68988021 is a wasteful number, since it uses less digits than its factorization.

68988021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116931.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 68988021 is about 8305.9027805531. The cubic root of 68988021 is about 410.1328560128.

The spelling of 68988021 in words is "sixty-eight million, nine hundred eighty-eight thousand, twenty-one".