68329831 has 2 divisors, whose sum is σ = 68329832. Its totient is φ = 68329830.

The previous prime is 68329823. The next prime is 68329837. The reversal of 68329831 is 13892386.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68329831 - 2³ = 68329823 is a prime.

It is a super-2 number, since 2×68329831² = 9337931608977122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68329837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34164915 + 34164916.

It is an arithmetic number, because the mean of its divisors is an integer number (34164916).

Almost surely, 2^68329831 is an apocalyptic number.

68329831 is a deficient number, since it is larger than the sum of its proper divisors (1).

68329831 is an equidigital number, since it uses as much as digits as its factorization.

68329831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 68329831 is about 8266.1860008108. The cubic root of 68329831 is about 408.8243756712.

The spelling of 68329831 in words is "sixty-eight million, three hundred twenty-nine thousand, eight hundred thirty-one".