117563521 has 2 divisors, whose sum is σ = 117563522. Its totient is φ = 117563520.

The previous prime is 117563513. The next prime is 117563549. The reversal of 117563521 is 125365711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116640000 + 923521 = 10800^2 + 961^2 .

It is an emirp because it is prime and its reverse (125365711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117563521 - 2³ = 117563513 is a prime.

It is not a weakly prime, because it can be changed into another prime (117563561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58781760 + 58781761.

It is an arithmetic number, because the mean of its divisors is an integer number (58781761).

Almost surely, 2^117563521 is an apocalyptic number.

It is an amenable number.

117563521 is a deficient number, since it is larger than the sum of its proper divisors (1).

117563521 is an equidigital number, since it uses as much as digits as its factorization.

117563521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 31.

The square root of 117563521 is about 10842.6713036963. The cubic root of 117563521 is about 489.8812998609.

The spelling of 117563521 in words is "one hundred seventeen million, five hundred sixty-three thousand, five hundred twenty-one".