68147689 has 4 divisors (see below), whose sum is σ = 71110656. Its totient is φ = 65184724.

The previous prime is 68147687. The next prime is 68147707. The reversal of 68147689 is 98674186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68147689 - 2¹ = 68147687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68147687) 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, 1481449 + ... + 1481494.

It is an arithmetic number, because the mean of its divisors is an integer number (17777664).

Almost surely, 2^68147689 is an apocalyptic number.

It is an amenable number.

68147689 is a deficient number, since it is larger than the sum of its proper divisors (2962967).

68147689 is a wasteful number, since it uses less digits than its factorization.

68147689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962966.

The product of its digits is 580608, while the sum is 49.

The square root of 68147689 is about 8255.1613551765. The cubic root of 68147689 is about 408.4607943429.

The spelling of 68147689 in words is "sixty-eight million, one hundred forty-seven thousand, six hundred eighty-nine".