68813131 has 2 divisors, whose sum is σ = 68813132. Its totient is φ = 68813130.

The previous prime is 68813113. The next prime is 68813137. The reversal of 68813131 is 13131886.

Together with previous prime (68813113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68813131 - 2⁵ = 68813099 is a prime.

It is a super-2 number, since 2×68813131² = 9470493996046322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68813093 and 68813102.

It is not a weakly prime, because it can be changed into another prime (68813137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34406565 + 34406566.

It is an arithmetic number, because the mean of its divisors is an integer number (34406566).

Almost surely, 2^68813131 is an apocalyptic number.

68813131 is a deficient number, since it is larger than the sum of its proper divisors (1).

68813131 is an equidigital number, since it uses as much as digits as its factorization.

68813131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 68813131 is about 8295.3680448790. The cubic root of 68813131 is about 409.7859898381.

The spelling of 68813131 in words is "sixty-eight million, eight hundred thirteen thousand, one hundred thirty-one".