90999099929 has 2 divisors, whose sum is σ = 90999099930. Its totient is φ = 90999099928.

The previous prime is 90999099899. The next prime is 90999099931. The reversal of 90999099929 is 92999099909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69931158025 + 21067941904 = 264445^2 + 145148^2 .

It is a cyclic number.

It is not a de Polignac number, because 90999099929 - 2¹² = 90999095833 is a prime.

Together with 90999099931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90999099979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45499549964 + 45499549965.

It is an arithmetic number, because the mean of its divisors is an integer number (45499549965).

Almost surely, 2^90999099929 is an apocalyptic number.

It is an amenable number.

90999099929 is a deficient number, since it is larger than the sum of its proper divisors (1).

90999099929 is an equidigital number, since it uses as much as digits as its factorization.

90999099929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86093442, while the sum is 74.

The spelling of 90999099929 in words is "ninety billion, nine hundred ninety-nine million, ninety-nine thousand, nine hundred twenty-nine".