90023429 has 2 divisors, whose sum is σ = 90023430. Its totient is φ = 90023428.

The previous prime is 90023399. The next prime is 90023443. The reversal of 90023429 is 92432009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48678529 + 41344900 = 6977^2 + 6430^2 .

It is a cyclic number.

It is not a de Polignac number, because 90023429 - 2¹² = 90019333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90023459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45011714 + 45011715.

It is an arithmetic number, because the mean of its divisors is an integer number (45011715).

Almost surely, 2^90023429 is an apocalyptic number.

It is an amenable number.

90023429 is a deficient number, since it is larger than the sum of its proper divisors (1).

90023429 is an equidigital number, since it uses as much as digits as its factorization.

90023429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 90023429 is about 9488.0677168747. The cubic root of 90023429 is about 448.1793582566.

The spelling of 90023429 in words is "ninety million, twenty-three thousand, four hundred twenty-nine".