68298787933 has 4 divisors (see below), whose sum is σ = 68446941948. Its totient is φ = 68150633920.

The previous prime is 68298787913. The next prime is 68298787957. The reversal of 68298787933 is 33978789286.

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 37588678884 + 30710109049 = 193878^2 + 175243^2 .

It is a cyclic number.

It is not a de Polignac number, because 68298787933 - 2¹⁷ = 68298656861 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 (68298787913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74076316 + ... + 74077237.

It is an arithmetic number, because the mean of its divisors is an integer number (17111735487).

Almost surely, 2^68298787933 is an apocalyptic number.

It is an amenable number.

68298787933 is a deficient number, since it is larger than the sum of its proper divisors (148154015).

68298787933 is a wasteful number, since it uses less digits than its factorization.

68298787933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148154014.

The product of its digits is 219469824, while the sum is 70.

The spelling of 68298787933 in words is "sixty-eight billion, two hundred ninety-eight million, seven hundred eighty-seven thousand, nine hundred thirty-three".