68138635 has 8 divisors (see below), whose sum is σ = 86576256. Its totient is φ = 51304320.

The previous prime is 68138633. The next prime is 68138641. The reversal of 68138635 is 53683186.

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

It is not a de Polignac number, because 68138635 - 2¹ = 68138633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68138633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400731 + ... + 400900.

It is an arithmetic number, because the mean of its divisors is an integer number (10822032).

Almost surely, 2^68138635 is an apocalyptic number.

68138635 is a deficient number, since it is larger than the sum of its proper divisors (18437621).

68138635 is a wasteful number, since it uses less digits than its factorization.

68138635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801653.

The product of its digits is 103680, while the sum is 40.

The square root of 68138635 is about 8254.6129527677. The cubic root of 68138635 is about 408.4427043784.

The spelling of 68138635 in words is "sixty-eight million, one hundred thirty-eight thousand, six hundred thirty-five".