117500521 has 2 divisors, whose sum is σ = 117500522. Its totient is φ = 117500520.

The previous prime is 117500519. The next prime is 117500531. The reversal of 117500521 is 125005711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59907600 + 57592921 = 7740^2 + 7589^2 .

It is a cyclic number.

It is not a de Polignac number, because 117500521 - 2¹ = 117500519 is a prime.

Together with 117500519, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 117500492 and 117500501.

It is not a weakly prime, because it can be changed into another prime (117500501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58750260 + 58750261.

It is an arithmetic number, because the mean of its divisors is an integer number (58750261).

Almost surely, 2^117500521 is an apocalyptic number.

It is an amenable number.

117500521 is a deficient number, since it is larger than the sum of its proper divisors (1).

117500521 is an equidigital number, since it uses as much as digits as its factorization.

117500521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 350, while the sum is 22.

The square root of 117500521 is about 10839.7657262507. The cubic root of 117500521 is about 489.7937782778.

The spelling of 117500521 in words is "one hundred seventeen million, five hundred thousand, five hundred twenty-one".