68203453 has 2 divisors, whose sum is σ = 68203454. Its totient is φ = 68203452.

The previous prime is 68203417. The next prime is 68203481. The reversal of 68203453 is 35430286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53626329 + 14577124 = 7323^2 + 3818^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68203453 is a prime.

It is a super-2 number, since 2×68203453² = 9303422002246418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68203403) 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, 34101726 + 34101727.

It is an arithmetic number, because the mean of its divisors is an integer number (34101727).

Almost surely, 2^68203453 is an apocalyptic number.

It is an amenable number.

68203453 is a deficient number, since it is larger than the sum of its proper divisors (1).

68203453 is an equidigital number, since it uses as much as digits as its factorization.

68203453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 68203453 is about 8258.5381878393. The cubic root of 68203453 is about 408.5721759521.

The spelling of 68203453 in words is "sixty-eight million, two hundred three thousand, four hundred fifty-three".