68912029 has 4 divisors (see below), whose sum is σ = 68991484. Its totient is φ = 68832576.

The previous prime is 68912027. The next prime is 68912087. The reversal of 68912029 is 92021986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59444100 + 9467929 = 7710^2 + 3077^2 .

It is a cyclic number.

It is not a de Polignac number, because 68912029 - 2¹ = 68912027 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68912023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38412 + ... + 40165.

It is an arithmetic number, because the mean of its divisors is an integer number (17247871).

Almost surely, 2^68912029 is an apocalyptic number.

It is an amenable number.

68912029 is a deficient number, since it is larger than the sum of its proper divisors (79455).

68912029 is an equidigital number, since it uses as much as digits as its factorization.

68912029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79454.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 68912029 is about 8301.3269421220. The cubic root of 68912029 is about 409.9822102136.

The spelling of 68912029 in words is "sixty-eight million, nine hundred twelve thousand, twenty-nine".