68357121 has 16 divisors (see below), whose sum is σ = 106130304. Its totient is φ = 38323584.

The previous prime is 68357111. The next prime is 68357131. The reversal of 68357121 is 12175386.

It is an interprime number because it is at equal distance from previous prime (68357111) and next prime (68357131).

It is not a de Polignac number, because 68357121 - 2⁷ = 68356993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68357101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29596 + ... + 31821.

It is an arithmetic number, because the mean of its divisors is an integer number (6633144).

Almost surely, 2^68357121 is an apocalyptic number.

It is an amenable number.

68357121 is a deficient number, since it is larger than the sum of its proper divisors (37773183).

68357121 is a wasteful number, since it uses less digits than its factorization.

68357121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61480.

The product of its digits is 10080, while the sum is 33.

The square root of 68357121 is about 8267.8365368457. The cubic root of 68357121 is about 408.8787947152.

The spelling of 68357121 in words is "sixty-eight million, three hundred fifty-seven thousand, one hundred twenty-one".