68171623 has 4 divisors (see below), whose sum is σ = 73415608. Its totient is φ = 62927640.

The previous prime is 68171603. The next prime is 68171633. The reversal of 68171623 is 32617186.

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

It is a cyclic number.

It is not a de Polignac number, because 68171623 - 2²¹ = 66074471 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 (68171603) 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, 2621973 + ... + 2621998.

It is an arithmetic number, because the mean of its divisors is an integer number (18353902).

Almost surely, 2^68171623 is an apocalyptic number.

68171623 is a deficient number, since it is larger than the sum of its proper divisors (5243985).

68171623 is a wasteful number, since it uses less digits than its factorization.

68171623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5243984.

The product of its digits is 12096, while the sum is 34.

The square root of 68171623 is about 8256.6108664512. The cubic root of 68171623 is about 408.5086069518.

The spelling of 68171623 in words is "sixty-eight million, one hundred seventy-one thousand, six hundred twenty-three".