68121933 has 32 divisors (see below), whose sum is σ = 103183872. Its totient is φ = 39614400.

The previous prime is 68121923. The next prime is 68121947. The reversal of 68121933 is 33912186.

It is not a de Polignac number, because 68121933 - 2⁵ = 68121901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 68121894 and 68121903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68121913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86166 + ... + 86952.

It is an arithmetic number, because the mean of its divisors is an integer number (3224496).

Almost surely, 2^68121933 is an apocalyptic number.

It is an amenable number.

68121933 is a deficient number, since it is larger than the sum of its proper divisors (35061939).

68121933 is a wasteful number, since it uses less digits than its factorization.

68121933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905.

The product of its digits is 7776, while the sum is 33.

The square root of 68121933 is about 8253.6012140156. The cubic root of 68121933 is about 408.4093294436.

The spelling of 68121933 in words is "sixty-eight million, one hundred twenty-one thousand, nine hundred thirty-three".