99752921 has 2 divisors, whose sum is σ = 99752922. Its totient is φ = 99752920.

The previous prime is 99752911. The next prime is 99752927. The reversal of 99752921 is 12925799.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74149321 + 25603600 = 8611^2 + 5060^2 .

It is a cyclic number.

It is not a de Polignac number, because 99752921 - 2⁶ = 99752857 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 (99752927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49876460 + 49876461.

It is an arithmetic number, because the mean of its divisors is an integer number (49876461).

Almost surely, 2^99752921 is an apocalyptic number.

It is an amenable number.

99752921 is a deficient number, since it is larger than the sum of its proper divisors (1).

99752921 is an equidigital number, since it uses as much as digits as its factorization.

99752921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 44.

The square root of 99752921 is about 9987.6384095541. The cubic root of 99752921 is about 463.7762883750.

The spelling of 99752921 in words is "ninety-nine million, seven hundred fifty-two thousand, nine hundred twenty-one".