68509271 has 4 divisors (see below), whose sum is σ = 68531112. Its totient is φ = 68487432.

The previous prime is 68509267. The next prime is 68509289. The reversal of 68509271 is 17290586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17290586 = 2 ⋅8645293.

It is a cyclic number.

It is not a de Polignac number, because 68509271 - 2² = 68509267 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 (68509171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5225 + ... + 12818.

It is an arithmetic number, because the mean of its divisors is an integer number (17132778).

Almost surely, 2^68509271 is an apocalyptic number.

68509271 is a deficient number, since it is larger than the sum of its proper divisors (21841).

68509271 is a wasteful number, since it uses less digits than its factorization.

68509271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21840.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 68509271 is about 8277.0327412666. The cubic root of 68509271 is about 409.1819321603.

The spelling of 68509271 in words is "sixty-eight million, five hundred nine thousand, two hundred seventy-one".