68453813 has 2 divisors, whose sum is σ = 68453814. Its totient is φ = 68453812.

The previous prime is 68453783. The next prime is 68453837. The reversal of 68453813 is 31835486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65966884 + 2486929 = 8122^2 + 1577^2 .

It is a cyclic number.

It is not a de Polignac number, because 68453813 - 2²⁶ = 1344949 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 (68453863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34226906 + 34226907.

It is an arithmetic number, because the mean of its divisors is an integer number (34226907).

Almost surely, 2^68453813 is an apocalyptic number.

It is an amenable number.

68453813 is a deficient number, since it is larger than the sum of its proper divisors (1).

68453813 is an equidigital number, since it uses as much as digits as its factorization.

68453813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The square root of 68453813 is about 8273.6819494104. The cubic root of 68453813 is about 409.0714919374.

The spelling of 68453813 in words is "sixty-eight million, four hundred fifty-three thousand, eight hundred thirteen".