90329489 has 2 divisors, whose sum is σ = 90329490. Its totient is φ = 90329488.

The previous prime is 90329453. The next prime is 90329497. The reversal of 90329489 is 98492309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53217025 + 37112464 = 7295^2 + 6092^2 .

It is an emirp because it is prime and its reverse (98492309) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90329489 - 2²⁰ = 89280913 is a prime.

It is a super-2 number, since 2×90329489² = 16318833166002242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90329089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45164744 + 45164745.

It is an arithmetic number, because the mean of its divisors is an integer number (45164745).

Almost surely, 2^90329489 is an apocalyptic number.

It is an amenable number.

90329489 is a deficient number, since it is larger than the sum of its proper divisors (1).

90329489 is an equidigital number, since it uses as much as digits as its factorization.

90329489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 90329489 is about 9504.1827107858. The cubic root of 90329489 is about 448.6866877365.

Subtracting 90329489 from its reverse (98492309), we obtain a triangular number (8162820 = T₄₀₄₀).

The spelling of 90329489 in words is "ninety million, three hundred twenty-nine thousand, four hundred eighty-nine".