68857961 has 8 divisors (see below), whose sum is σ = 70696704. Its totient is φ = 67034880.

The previous prime is 68857949. The next prime is 68857967. The reversal of 68857961 is 16975886.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68857961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68857967) 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 7 ways as a sum of consecutive naturals, for example, 5276 + ... + 12866.

It is an arithmetic number, because the mean of its divisors is an integer number (8837088).

Almost surely, 2^68857961 is an apocalyptic number.

It is an amenable number.

68857961 is a deficient number, since it is larger than the sum of its proper divisors (1838743).

68857961 is a wasteful number, since it uses less digits than its factorization.

68857961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7831.

The product of its digits is 725760, while the sum is 50.

The square root of 68857961 is about 8298.0697153013. The cubic root of 68857961 is about 409.8749588946.

The spelling of 68857961 in words is "sixty-eight million, eight hundred fifty-seven thousand, nine hundred sixty-one".