68993453 has 2 divisors, whose sum is σ = 68993454. Its totient is φ = 68993452.

The previous prime is 68993411. The next prime is 68993459. The reversal of 68993453 is 35439986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57957769 + 11035684 = 7613^2 + 3322^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68993453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68993398 and 68993407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68993459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34496726 + 34496727.

It is an arithmetic number, because the mean of its divisors is an integer number (34496727).

Almost surely, 2^68993453 is an apocalyptic number.

It is an amenable number.

68993453 is a deficient number, since it is larger than the sum of its proper divisors (1).

68993453 is an equidigital number, since it uses as much as digits as its factorization.

68993453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 47.

The square root of 68993453 is about 8306.2297704795. The cubic root of 68993453 is about 410.1436201193.

The spelling of 68993453 in words is "sixty-eight million, nine hundred ninety-three thousand, four hundred fifty-three".