68415653 has 2 divisors, whose sum is σ = 68415654. Its totient is φ = 68415652.

The previous prime is 68415649. The next prime is 68415679. The reversal of 68415653 is 35651486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52678564 + 15737089 = 7258^2 + 3967^2 .

It is a cyclic number.

It is not a de Polignac number, because 68415653 - 2² = 68415649 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68415253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34207826 + 34207827.

It is an arithmetic number, because the mean of its divisors is an integer number (34207827).

Almost surely, 2^68415653 is an apocalyptic number.

It is an amenable number.

68415653 is a deficient number, since it is larger than the sum of its proper divisors (1).

68415653 is an equidigital number, since it uses as much as digits as its factorization.

68415653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 38.

The square root of 68415653 is about 8271.3755204319. The cubic root of 68415653 is about 408.9954646668.

The spelling of 68415653 in words is "sixty-eight million, four hundred fifteen thousand, six hundred fifty-three".