68847949 has 4 divisors (see below), whose sum is σ = 68922364. Its totient is φ = 68773536.

The previous prime is 68847941. The next prime is 68847953. The reversal of 68847949 is 94974886.

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

It can be written as a sum of positive squares in 2 ways, for example, as 40832100 + 28015849 = 6390^2 + 5293^2 .

It is a cyclic number.

It is not a de Polignac number, because 68847949 - 2³ = 68847941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68847949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68847941) 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, 35802 + ... + 37675.

It is an arithmetic number, because the mean of its divisors is an integer number (17230591).

Almost surely, 2^68847949 is an apocalyptic number.

It is an amenable number.

68847949 is a deficient number, since it is larger than the sum of its proper divisors (74415).

68847949 is an equidigital number, since it uses as much as digits as its factorization.

68847949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74414.

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

The square root of 68847949 is about 8297.4664205407. The cubic root of 68847949 is about 409.8550925546.

It can be divided in two parts, 68847 and 949, that added together give a palindrome (69796).

The spelling of 68847949 in words is "sixty-eight million, eight hundred forty-seven thousand, nine hundred forty-nine".