68013133 has 2 divisors, whose sum is σ = 68013134. Its totient is φ = 68013132.

The previous prime is 68013083. The next prime is 68013157. The reversal of 68013133 is 33131086.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65901924 + 2111209 = 8118^2 + 1453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68013133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68013098 and 68013107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68043133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34006566 + 34006567.

It is an arithmetic number, because the mean of its divisors is an integer number (34006567).

Almost surely, 2^68013133 is an apocalyptic number.

It is an amenable number.

68013133 is a deficient number, since it is larger than the sum of its proper divisors (1).

68013133 is an equidigital number, since it uses as much as digits as its factorization.

68013133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 68013133 is about 8247.0075178819. The cubic root of 68013133 is about 408.1917851554.

The spelling of 68013133 in words is "sixty-eight million, thirteen thousand, one hundred thirty-three".