68135291 has 8 divisors (see below), whose sum is σ = 77928960. Its totient is φ = 58356648.

The previous prime is 68135267. The next prime is 68135293. The reversal of 68135291 is 19253186.

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

It is not a de Polignac number, because 68135291 - 2⁶ = 68135227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68135293) 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, 8750 + ... + 14588.

It is an arithmetic number, because the mean of its divisors is an integer number (9741120).

Almost surely, 2^68135291 is an apocalyptic number.

68135291 is a deficient number, since it is larger than the sum of its proper divisors (9793669).

68135291 is a wasteful number, since it uses less digits than its factorization.

68135291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7513.

The product of its digits is 12960, while the sum is 35.

The square root of 68135291 is about 8254.4103968727. The cubic root of 68135291 is about 408.4360226344.

The spelling of 68135291 in words is "sixty-eight million, one hundred thirty-five thousand, two hundred ninety-one".