90392289 has 8 divisors (see below), whose sum is σ = 129794112. Its totient is φ = 55626000.

The previous prime is 90392261. The next prime is 90392293. The reversal of 90392289 is 98229309.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90392289 - 2⁷ = 90392161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90392289.

It is not an unprimeable number, because it can be changed into a prime (90392219) 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 in 7 ways as a sum of consecutive naturals, for example, 1158837 + ... + 1158914.

It is an arithmetic number, because the mean of its divisors is an integer number (16224264).

Almost surely, 2^90392289 is an apocalyptic number.

It is an amenable number.

90392289 is a deficient number, since it is larger than the sum of its proper divisors (39401823).

90392289 is a wasteful number, since it uses less digits than its factorization.

90392289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317767.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 90392289 is about 9507.4859452959. The cubic root of 90392289 is about 448.7906441773.

The spelling of 90392289 in words is "ninety million, three hundred ninety-two thousand, two hundred eighty-nine".