68007021 has 16 divisors (see below), whose sum is σ = 100185984. Its totient is φ = 40815104.

The previous prime is 68007013. The next prime is 68007029. The reversal of 68007021 is 12070086.

It is an interprime number because it is at equal distance from previous prime (68007013) and next prime (68007029).

It is a cyclic number.

It is not a de Polignac number, because 68007021 - 2³ = 68007013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68006982 and 68007000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68007029) 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 15 ways as a sum of consecutive naturals, for example, 27816 + ... + 30161.

It is an arithmetic number, because the mean of its divisors is an integer number (6261624).

Almost surely, 2^68007021 is an apocalyptic number.

It is an amenable number.

68007021 is a deficient number, since it is larger than the sum of its proper divisors (32178963).

68007021 is a wasteful number, since it uses less digits than its factorization.

68007021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58020.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 68007021 is about 8246.6369509031. The cubic root of 68007021 is about 408.1795574046.

The spelling of 68007021 in words is "sixty-eight million, seven thousand, twenty-one".