108681553 has 2 divisors, whose sum is σ = 108681554. Its totient is φ = 108681552.

The previous prime is 108681499. The next prime is 108681557. The reversal of 108681553 is 355186801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68840209 + 39841344 = 8297^2 + 6312^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108681553 is a prime.

It is not a weakly prime, because it can be changed into another prime (108681557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54340776 + 54340777.

It is an arithmetic number, because the mean of its divisors is an integer number (54340777).

Almost surely, 2^108681553 is an apocalyptic number.

It is an amenable number.

108681553 is a deficient number, since it is larger than the sum of its proper divisors (1).

108681553 is an equidigital number, since it uses as much as digits as its factorization.

108681553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 108681553 is about 10425.0445082983. The cubic root of 108681553 is about 477.2199730524.

It can be divided in two parts, 10868 and 1553, that added together give a palindrome (12421).

The spelling of 108681553 in words is "one hundred eight million, six hundred eighty-one thousand, five hundred fifty-three".