68811629 has 2 divisors, whose sum is σ = 68811630. Its totient is φ = 68811628.

The previous prime is 68811569. The next prime is 68811637. The reversal of 68811629 is 92611886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56400100 + 12411529 = 7510^2 + 3523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68811629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68811829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34405814 + 34405815.

It is an arithmetic number, because the mean of its divisors is an integer number (34405815).

Almost surely, 2^68811629 is an apocalyptic number.

It is an amenable number.

68811629 is a deficient number, since it is larger than the sum of its proper divisors (1).

68811629 is an equidigital number, since it uses as much as digits as its factorization.

68811629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 68811629 is about 8295.2775119341. The cubic root of 68811629 is about 409.7830083188.

The spelling of 68811629 in words is "sixty-eight million, eight hundred eleven thousand, six hundred twenty-nine".