68849947 has 4 divisors (see below), whose sum is σ = 70529256. Its totient is φ = 67170640.

The previous prime is 68849929. The next prime is 68849987. The reversal of 68849947 is 74994886.

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 68849947 - 2⁷ = 68849819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68849917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839593 + ... + 839674.

It is an arithmetic number, because the mean of its divisors is an integer number (17632314).

Almost surely, 2^68849947 is an apocalyptic number.

68849947 is a deficient number, since it is larger than the sum of its proper divisors (1679309).

68849947 is a wasteful number, since it uses less digits than its factorization.

68849947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679308.

The product of its digits is 3483648, while the sum is 55.

The square root of 68849947 is about 8297.5868178646. The cubic root of 68849947 is about 409.8590572457.

It can be divided in two parts, 68849 and 947, that added together give a palindrome (69796).

The spelling of 68849947 in words is "sixty-eight million, eight hundred forty-nine thousand, nine hundred forty-seven".