68508029 has 4 divisors (see below), whose sum is σ = 68606460. Its totient is φ = 68409600.

The previous prime is 68508019. The next prime is 68508031. The reversal of 68508029 is 92080586.

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 31663129 + 36844900 = 5627^2 + 6070^2 .

It is a cyclic number.

It is not a de Polignac number, because 68508029 - 2¹² = 68503933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68507983 and 68508001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68508019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48164 + ... + 49565.

It is an arithmetic number, because the mean of its divisors is an integer number (17151615).

Almost surely, 2^68508029 is an apocalyptic number.

It is an amenable number.

68508029 is a deficient number, since it is larger than the sum of its proper divisors (98431).

68508029 is an equidigital number, since it uses as much as digits as its factorization.

68508029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98430.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 68508029 is about 8276.9577140396. The cubic root of 68508029 is about 409.1794594681.

The spelling of 68508029 in words is "sixty-eight million, five hundred eight thousand, twenty-nine".