68648933 has 4 divisors (see below), whose sum is σ = 68948940. Its totient is φ = 68348928.

The previous prime is 68648897. The next prime is 68648947. The reversal of 68648933 is 33984686.

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 29235649 + 39413284 = 5407^2 + 6278^2 .

It is a cyclic number.

It is not a de Polignac number, because 68648933 - 2⁶ = 68648869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68648033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149660 + ... + 150117.

It is an arithmetic number, because the mean of its divisors is an integer number (17237235).

Almost surely, 2^68648933 is an apocalyptic number.

It is an amenable number.

68648933 is a deficient number, since it is larger than the sum of its proper divisors (300007).

68648933 is a wasteful number, since it uses less digits than its factorization.

68648933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300006.

The product of its digits is 746496, while the sum is 47.

The square root of 68648933 is about 8285.4651649741. The cubic root of 68648933 is about 409.4597942023.

The spelling of 68648933 in words is "sixty-eight million, six hundred forty-eight thousand, nine hundred thirty-three".