68723929 has 2 divisors, whose sum is σ = 68723930. Its totient is φ = 68723928.

The previous prime is 68723927. The next prime is 68723947. The reversal of 68723929 is 92932786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67683529 + 1040400 = 8227^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 68723929 - 2¹ = 68723927 is a prime.

Together with 68723927, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68723923) 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, 34361964 + 34361965.

It is an arithmetic number, because the mean of its divisors is an integer number (34361965).

Almost surely, 2^68723929 is an apocalyptic number.

It is an amenable number.

68723929 is a deficient number, since it is larger than the sum of its proper divisors (1).

68723929 is an equidigital number, since it uses as much as digits as its factorization.

68723929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 68723929 is about 8289.9896863627. The cubic root of 68723929 is about 409.6088456628.

It can be divided in two parts, 6872 and 3929, that added together give a palindrome (10801).

The spelling of 68723929 in words is "sixty-eight million, seven hundred twenty-three thousand, nine hundred twenty-nine".