68338553 has 2 divisors, whose sum is σ = 68338554. Its totient is φ = 68338552.

The previous prime is 68338547. The next prime is 68338597. The reversal of 68338553 is 35583386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68095504 + 243049 = 8252^2 + 493^2 .

It is a cyclic number.

It is not a de Polignac number, because 68338553 - 2²⁰ = 67289977 is a prime.

It is a super-2 number, since 2×68338553² = 9340315652267618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68338553.

It is not a weakly prime, because it can be changed into another prime (68388553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34169276 + 34169277.

It is an arithmetic number, because the mean of its divisors is an integer number (34169277).

Almost surely, 2^68338553 is an apocalyptic number.

It is an amenable number.

68338553 is a deficient number, since it is larger than the sum of its proper divisors (1).

68338553 is an equidigital number, since it uses as much as digits as its factorization.

68338553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 259200, while the sum is 41.

The square root of 68338553 is about 8266.7135549746. The cubic root of 68338553 is about 408.8417698041.

The spelling of 68338553 in words is "sixty-eight million, three hundred thirty-eight thousand, five hundred fifty-three".