68921093 has 2 divisors, whose sum is σ = 68921094. Its totient is φ = 68921092.

The previous prime is 68921089. The next prime is 68921117. The reversal of 68921093 is 39012986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68178049 + 743044 = 8257^2 + 862^2 .

It is a cyclic number.

It is not a de Polignac number, because 68921093 - 2² = 68921089 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68921003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34460546 + 34460547.

It is an arithmetic number, because the mean of its divisors is an integer number (34460547).

Almost surely, 2^68921093 is an apocalyptic number.

It is an amenable number.

68921093 is a deficient number, since it is larger than the sum of its proper divisors (1).

68921093 is an equidigital number, since it uses as much as digits as its factorization.

68921093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 68921093 is about 8301.8728609875. The cubic root of 68921093 is about 410.0001844140. Note that the first 3 decimals are identical.

The spelling of 68921093 in words is "sixty-eight million, nine hundred twenty-one thousand, ninety-three".