68178031 has 2 divisors, whose sum is σ = 68178032. Its totient is φ = 68178030.

The previous prime is 68177999. The next prime is 68178113. The reversal of 68178031 is 13087186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68178031 - 2⁵ = 68177999 is a prime.

It is a super-2 number, since 2×68178031² = 9296487822073922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68178431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34089015 + 34089016.

It is an arithmetic number, because the mean of its divisors is an integer number (34089016).

Almost surely, 2^68178031 is an apocalyptic number.

68178031 is a deficient number, since it is larger than the sum of its proper divisors (1).

68178031 is an equidigital number, since it uses as much as digits as its factorization.

68178031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 68178031 is about 8256.9989100157. The cubic root of 68178031 is about 408.5214062223.

The spelling of 68178031 in words is "sixty-eight million, one hundred seventy-eight thousand, thirty-one".