90929899 has 2 divisors, whose sum is σ = 90929900. Its totient is φ = 90929898.

The previous prime is 90929897. The next prime is 90929929. The reversal of 90929899 is 99892909.

It is a weak prime.

It is an emirp because it is prime and its reverse (99892909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90929899 - 2¹ = 90929897 is a prime.

Together with 90929897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (90929893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45464949 + 45464950.

It is an arithmetic number, because the mean of its divisors is an integer number (45464950).

Almost surely, 2^90929899 is an apocalyptic number.

90929899 is a deficient number, since it is larger than the sum of its proper divisors (1).

90929899 is an equidigital number, since it uses as much as digits as its factorization.

90929899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 55.

The square root of 90929899 is about 9535.7170155159. The cubic root of 90929899 is about 449.6786166179.

The spelling of 90929899 in words is "ninety million, nine hundred twenty-nine thousand, eight hundred ninety-nine".