99948521 has 2 divisors, whose sum is σ = 99948522. Its totient is φ = 99948520.

The previous prime is 99948481. The next prime is 99948533. The reversal of 99948521 is 12584999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57229225 + 42719296 = 7565^2 + 6536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99948521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99948221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49974260 + 49974261.

It is an arithmetic number, because the mean of its divisors is an integer number (49974261).

Almost surely, 2^99948521 is an apocalyptic number.

It is an amenable number.

99948521 is a deficient number, since it is larger than the sum of its proper divisors (1).

99948521 is an equidigital number, since it uses as much as digits as its factorization.

99948521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 47.

The square root of 99948521 is about 9997.4257186538. The cubic root of 99948521 is about 464.0792215728.

The spelling of 99948521 in words is "ninety-nine million, nine hundred forty-eight thousand, five hundred twenty-one".