68633405 has 8 divisors (see below), whose sum is σ = 82473432. Its totient is φ = 54831168.

The previous prime is 68633387. The next prime is 68633429. The reversal of 68633405 is 50433686.

It can be written as a sum of positive squares in 4 ways, for example, as 7496644 + 61136761 = 2738^2 + 7819^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68633405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5282 + ... + 12851.

It is an arithmetic number, because the mean of its divisors is an integer number (10309179).

Almost surely, 2^68633405 is an apocalyptic number.

It is an amenable number.

68633405 is a deficient number, since it is larger than the sum of its proper divisors (13840027).

68633405 is a wasteful number, since it uses less digits than its factorization.

68633405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18895.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 68633405 is about 8284.5280493218. The cubic root of 68633405 is about 409.4289193785.

The spelling of 68633405 in words is "sixty-eight million, six hundred thirty-three thousand, four hundred five".