68328031 has 4 divisors (see below), whose sum is σ = 70684200. Its totient is φ = 65971864.

The previous prime is 68328019. The next prime is 68328041. The reversal of 68328031 is 13082386.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68328031 - 2²³ = 59939423 is a prime.

It is a super-2 number, since 2×68328031² = 9337439640673922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68327984 and 68328002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68328041) 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 3 ways as a sum of consecutive naturals, for example, 1178041 + ... + 1178098.

It is an arithmetic number, because the mean of its divisors is an integer number (17671050).

Almost surely, 2^68328031 is an apocalyptic number.

68328031 is a deficient number, since it is larger than the sum of its proper divisors (2356169).

68328031 is a wasteful number, since it uses less digits than its factorization.

68328031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356168.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 68328031 is about 8266.0771227953. The cubic root of 68328031 is about 408.8207857782.

The spelling of 68328031 in words is "sixty-eight million, three hundred twenty-eight thousand, thirty-one".