68812061 has 2 divisors, whose sum is σ = 68812062. Its totient is φ = 68812060.

The previous prime is 68812013. The next prime is 68812069. The reversal of 68812061 is 16021886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43309561 + 25502500 = 6581^2 + 5050^2 .

It is a cyclic number.

It is not a de Polignac number, because 68812061 - 2²² = 64617757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68812069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34406030 + 34406031.

It is an arithmetic number, because the mean of its divisors is an integer number (34406031).

Almost surely, 2^68812061 is an apocalyptic number.

It is an amenable number.

68812061 is a deficient number, since it is larger than the sum of its proper divisors (1).

68812061 is an equidigital number, since it uses as much as digits as its factorization.

68812061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 68812061 is about 8295.3035508051. The cubic root of 68812061 is about 409.7838658575.

The spelling of 68812061 in words is "sixty-eight million, eight hundred twelve thousand, sixty-one".