68069405 has 8 divisors (see below), whose sum is σ = 81738072. Its totient is φ = 54419008.

The previous prime is 68069401. The next prime is 68069423. The reversal of 68069405 is 50496086.

It can be written as a sum of positive squares in 4 ways, for example, as 15912121 + 52157284 = 3989^2 + 7222^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68069405 - 2² = 68069401 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 (68069401) 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 in 7 ways as a sum of consecutive naturals, for example, 5759 + ... + 13011.

It is an arithmetic number, because the mean of its divisors is an integer number (10217259).

Almost surely, 2^68069405 is an apocalyptic number.

It is an amenable number.

68069405 is a deficient number, since it is larger than the sum of its proper divisors (13668667).

68069405 is a wasteful number, since it uses less digits than its factorization.

68069405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9135.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 68069405 is about 8250.4184742351. The cubic root of 68069405 is about 408.3043292833.

The spelling of 68069405 in words is "sixty-eight million, sixty-nine thousand, four hundred five".