99201901 has 2 divisors, whose sum is σ = 99201902. Its totient is φ = 99201900.

The previous prime is 99201871. The next prime is 99201923. The reversal of 99201901 is 10910299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86769225 + 12432676 = 9315^2 + 3526^2 .

It is an emirp because it is prime and its reverse (10910299) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99201901 - 2¹¹ = 99199853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99201701) 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, 49600950 + 49600951.

It is an arithmetic number, because the mean of its divisors is an integer number (49600951).

Almost surely, 2^99201901 is an apocalyptic number.

It is an amenable number.

99201901 is a deficient number, since it is larger than the sum of its proper divisors (1).

99201901 is an equidigital number, since it uses as much as digits as its factorization.

99201901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 99201901 is about 9960.0151104303. The cubic root of 99201901 is about 462.9207678982.

The spelling of 99201901 in words is "ninety-nine million, two hundred one thousand, nine hundred one".