90940489 has 2 divisors, whose sum is σ = 90940490. Its totient is φ = 90940488.

The previous prime is 90940439. The next prime is 90940547. The reversal of 90940489 is 98404909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60964864 + 29975625 = 7808^2 + 5475^2 .

It is a cyclic number.

It is not a de Polignac number, because 90940489 - 2¹³ = 90932297 is a prime.

It is not a weakly prime, because it can be changed into another prime (90940439) 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, 45470244 + 45470245.

It is an arithmetic number, because the mean of its divisors is an integer number (45470245).

Almost surely, 2^90940489 is an apocalyptic number.

It is an amenable number.

90940489 is a deficient number, since it is larger than the sum of its proper divisors (1).

90940489 is an equidigital number, since it uses as much as digits as its factorization.

90940489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 90940489 is about 9536.2722800893. The cubic root of 90940489 is about 449.6960729652.

The spelling of 90940489 in words is "ninety million, nine hundred forty thousand, four hundred eighty-nine".