68091355 has 4 divisors (see below), whose sum is σ = 81709632. Its totient is φ = 54473080.

The previous prime is 68091349. The next prime is 68091367. The reversal of 68091355 is 55319086.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68091355 - 2³ = 68091347 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6809131 + ... + 6809140.

It is an arithmetic number, because the mean of its divisors is an integer number (20427408).

Almost surely, 2^68091355 is an apocalyptic number.

68091355 is a deficient number, since it is larger than the sum of its proper divisors (13618277).

68091355 is a wasteful number, since it uses less digits than its factorization.

68091355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13618276.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 68091355 is about 8251.7486025690. The cubic root of 68091355 is about 408.3482125172.

The spelling of 68091355 in words is "sixty-eight million, ninety-one thousand, three hundred fifty-five".