90761209 has 8 divisors (see below), whose sum is σ = 113156928. Its totient is φ = 70722960.

The previous prime is 90761201. The next prime is 90761227. The reversal of 90761209 is 90216709.

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

It is not a de Polignac number, because 90761209 - 2³ = 90761201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90761201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589282 + ... + 589435.

It is an arithmetic number, because the mean of its divisors is an integer number (14144616).

Almost surely, 2^90761209 is an apocalyptic number.

It is an amenable number.

90761209 is a deficient number, since it is larger than the sum of its proper divisors (22395719).

90761209 is a wasteful number, since it uses less digits than its factorization.

90761209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178735.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 90761209 is about 9526.8677433876. The cubic root of 90761209 is about 449.4003684152.

The spelling of 90761209 in words is "ninety million, seven hundred sixty-one thousand, two hundred nine".