9990099877 has 2 divisors, whose sum is σ = 9990099878. Its totient is φ = 9990099876.

The previous prime is 9990099871. The next prime is 9990099907. The reversal of 9990099877 is 7789900999.

9990099877 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6943722241 + 3046377636 = 83329^2 + 55194^2 .

It is a cyclic number.

It is not a de Polignac number, because 9990099877 - 2¹¹ = 9990097829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9990099871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995049938 + 4995049939.

It is an arithmetic number, because the mean of its divisors is an integer number (4995049939).

Almost surely, 2^9990099877 is an apocalyptic number.

It is an amenable number.

9990099877 is a deficient number, since it is larger than the sum of its proper divisors (1).

9990099877 is an equidigital number, since it uses as much as digits as its factorization.

9990099877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23147208, while the sum is 67.

The square root of 9990099877 is about 99950.4871273772. The cubic root of 9990099877 is about 2153.7234829981.

The spelling of 9990099877 in words is "nine billion, nine hundred ninety million, ninety-nine thousand, eight hundred seventy-seven".