68361929 has 2 divisors, whose sum is σ = 68361930. Its totient is φ = 68361928.

The previous prime is 68361901. The next prime is 68361971. The reversal of 68361929 is 92916386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55950400 + 12411529 = 7480^2 + 3523^2 .

It is a cyclic number.

It is not a de Polignac number, because 68361929 - 2⁸ = 68361673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68361929.

It is not a weakly prime, because it can be changed into another prime (68361989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34180964 + 34180965.

It is an arithmetic number, because the mean of its divisors is an integer number (34180965).

Almost surely, 2^68361929 is an apocalyptic number.

It is an amenable number.

68361929 is a deficient number, since it is larger than the sum of its proper divisors (1).

68361929 is an equidigital number, since it uses as much as digits as its factorization.

68361929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 68361929 is about 8268.1272970365. The cubic root of 68361929 is about 408.8883808570. Note that the first 3 decimals are identical.

The spelling of 68361929 in words is "sixty-eight million, three hundred sixty-one thousand, nine hundred twenty-nine".