99090427 has 2 divisors, whose sum is σ = 99090428. Its totient is φ = 99090426.

The previous prime is 99090401. The next prime is 99090437. The reversal of 99090427 is 72409099.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99090427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99090427.

It is not a weakly prime, because it can be changed into another prime (99090437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49545213 + 49545214.

It is an arithmetic number, because the mean of its divisors is an integer number (49545214).

Almost surely, 2^99090427 is an apocalyptic number.

99090427 is a deficient number, since it is larger than the sum of its proper divisors (1).

99090427 is an equidigital number, since it uses as much as digits as its factorization.

99090427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 99090427 is about 9954.4174616097. The cubic root of 99090427 is about 462.7473069384.

The spelling of 99090427 in words is "ninety-nine million, ninety thousand, four hundred twenty-seven".