68181007 has 2 divisors, whose sum is σ = 68181008. Its totient is φ = 68181006.

The previous prime is 68180969. The next prime is 68181011. The reversal of 68181007 is 70018186.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68181007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68181007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68181017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34090503 + 34090504.

It is an arithmetic number, because the mean of its divisors is an integer number (34090504).

Almost surely, 2^68181007 is an apocalyptic number.

68181007 is a deficient number, since it is larger than the sum of its proper divisors (1).

68181007 is an equidigital number, since it uses as much as digits as its factorization.

68181007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 68181007 is about 8257.1791188032. The cubic root of 68181007 is about 408.5273501801.

The spelling of 68181007 in words is "sixty-eight million, one hundred eighty-one thousand, seven".