68606731 has 2 divisors, whose sum is σ = 68606732. Its totient is φ = 68606730.

The previous prime is 68606717. The next prime is 68606743. The reversal of 68606731 is 13760686.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68606731 is a prime.

It is a super-2 number, since 2×68606731² = 9413767077012722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68606711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34303365 + 34303366.

It is an arithmetic number, because the mean of its divisors is an integer number (34303366).

Almost surely, 2^68606731 is an apocalyptic number.

68606731 is a deficient number, since it is larger than the sum of its proper divisors (1).

68606731 is an equidigital number, since it uses as much as digits as its factorization.

68606731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 68606731 is about 8282.9180244646. The cubic root of 68606731 is about 409.3758717306.

The spelling of 68606731 in words is "sixty-eight million, six hundred six thousand, seven hundred thirty-one".