90589489 has 2 divisors, whose sum is σ = 90589490. Its totient is φ = 90589488.

The previous prime is 90589487. The next prime is 90589507. The reversal of 90589489 is 98498509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89397025 + 1192464 = 9455^2 + 1092^2 .

It is a cyclic number.

It is not a de Polignac number, because 90589489 - 2¹ = 90589487 is a prime.

It is a super-2 number, since 2×90589489² = 16412911034562242, which contains 22 as substring.

Together with 90589487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (90589483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45294744 + 45294745.

It is an arithmetic number, because the mean of its divisors is an integer number (45294745).

Almost surely, 2^90589489 is an apocalyptic number.

It is an amenable number.

90589489 is a deficient number, since it is larger than the sum of its proper divisors (1).

90589489 is an equidigital number, since it uses as much as digits as its factorization.

90589489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 52.

The square root of 90589489 is about 9517.8510704885. The cubic root of 90589489 is about 449.1167679929.

The spelling of 90589489 in words is "ninety million, five hundred eighty-nine thousand, four hundred eighty-nine".