99273521 has 2 divisors, whose sum is σ = 99273522. Its totient is φ = 99273520.

The previous prime is 99273481. The next prime is 99273527. The reversal of 99273521 is 12537299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93392896 + 5880625 = 9664^2 + 2425^2 .

It is a cyclic number.

It is not a de Polignac number, because 99273521 - 2⁶ = 99273457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (99273527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49636760 + 49636761.

It is an arithmetic number, because the mean of its divisors is an integer number (49636761).

Almost surely, 2^99273521 is an apocalyptic number.

It is an amenable number.

99273521 is a deficient number, since it is larger than the sum of its proper divisors (1).

99273521 is an equidigital number, since it uses as much as digits as its factorization.

99273521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 99273521 is about 9963.6098378048. The cubic root of 99273521 is about 463.0321448293.

The spelling of 99273521 in words is "ninety-nine million, two hundred seventy-three thousand, five hundred twenty-one".