99090909077 has 2 divisors, whose sum is σ = 99090909078. Its totient is φ = 99090909076.

The previous prime is 99090909031. The next prime is 99090909101. The reversal of 99090909077 is 77090909099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96978679396 + 2112229681 = 311414^2 + 45959^2 .

It is a cyclic number.

It is not a de Polignac number, because 99090909077 - 2⁸ = 99090908821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99090909377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49545454538 + 49545454539.

It is an arithmetic number, because the mean of its divisors is an integer number (49545454539).

Almost surely, 2^99090909077 is an apocalyptic number.

It is an amenable number.

99090909077 is a deficient number, since it is larger than the sum of its proper divisors (1).

99090909077 is an equidigital number, since it uses as much as digits as its factorization.

99090909077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2893401, while the sum is 59.

The spelling of 99090909077 in words is "ninety-nine billion, ninety million, nine hundred nine thousand, seventy-seven".