68957839 has 4 divisors (see below), whose sum is σ = 68974456. Its totient is φ = 68941224.

The previous prime is 68957773. The next prime is 68957893. The reversal of 68957839 is 93875986.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 68957839 - 2⁷ = 68957711 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 68957839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68997839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3772 + ... + 12334.

It is an arithmetic number, because the mean of its divisors is an integer number (17243614).

Almost surely, 2^68957839 is an apocalyptic number.

68957839 is a deficient number, since it is larger than the sum of its proper divisors (16617).

68957839 is an equidigital number, since it uses as much as digits as its factorization.

68957839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16616.

The product of its digits is 3265920, while the sum is 55.

The square root of 68957839 is about 8304.0856811572. The cubic root of 68957839 is about 410.0730367605.

It can be divided in two parts, 68957 and 839, that added together give a palindrome (69796).

The spelling of 68957839 in words is "sixty-eight million, nine hundred fifty-seven thousand, eight hundred thirty-nine".