99784950901 has 2 divisors, whose sum is σ = 99784950902. Its totient is φ = 99784950900.

The previous prime is 99784950871. The next prime is 99784950913. The reversal of 99784950901 is 10905948799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90303255025 + 9481695876 = 300505^2 + 97374^2 .

It is an emirp because it is prime and its reverse (10905948799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99784950901 - 2²³ = 99776562293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99784950901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99784950971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49892475450 + 49892475451.

It is an arithmetic number, because the mean of its divisors is an integer number (49892475451).

Almost surely, 2^99784950901 is an apocalyptic number.

It is an amenable number.

99784950901 is a deficient number, since it is larger than the sum of its proper divisors (1).

99784950901 is an equidigital number, since it uses as much as digits as its factorization.

99784950901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7348320, while the sum is 61.

The spelling of 99784950901 in words is "ninety-nine billion, seven hundred eighty-four million, nine hundred fifty thousand, nine hundred one".