68145031 has 2 divisors, whose sum is σ = 68145032. Its totient is φ = 68145030.

The previous prime is 68145023. The next prime is 68145043. The reversal of 68145031 is 13054186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68145031 - 2³ = 68145023 is a prime.

It is a super-2 number, since 2×68145031² = 9287490499981922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68145071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34072515 + 34072516.

It is an arithmetic number, because the mean of its divisors is an integer number (34072516).

Almost surely, 2^68145031 is an apocalyptic number.

68145031 is a deficient number, since it is larger than the sum of its proper divisors (1).

68145031 is an equidigital number, since it uses as much as digits as its factorization.

68145031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 68145031 is about 8255.0003634161. Note that the first 3 decimals coincide. The cubic root of 68145031 is about 408.4554838038.

The spelling of 68145031 in words is "sixty-eight million, one hundred forty-five thousand, thirty-one".