108887521 has 2 divisors, whose sum is σ = 108887522. Its totient is φ = 108887520.

The previous prime is 108887503. The next prime is 108887539. The reversal of 108887521 is 125788801.

It is a balanced prime because it is at equal distance from previous prime (108887503) and next prime (108887539).

It can be written as a sum of positive squares in only one way, i.e., 88736400 + 20151121 = 9420^2 + 4489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108887521 is a prime.

It is not a weakly prime, because it can be changed into another prime (108887321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54443760 + 54443761.

It is an arithmetic number, because the mean of its divisors is an integer number (54443761).

Almost surely, 2^108887521 is an apocalyptic number.

It is an amenable number.

108887521 is a deficient number, since it is larger than the sum of its proper divisors (1).

108887521 is an equidigital number, since it uses as much as digits as its factorization.

108887521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35840, while the sum is 40.

The square root of 108887521 is about 10434.9183513816. The cubic root of 108887521 is about 477.5212508474.

The spelling of 108887521 in words is "one hundred eight million, eight hundred eighty-seven thousand, five hundred twenty-one".