90505419 has 8 divisors (see below), whose sum is σ = 120781632. Its totient is φ = 60283080.

The previous prime is 90505403. The next prime is 90505423. The reversal of 90505419 is 91450509.

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

It is not a de Polignac number, because 90505419 - 2⁴ = 90505403 is a prime.

It is a super-2 number, since 2×90505419² = 16382461736731122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90505419.

It is not an unprimeable number, because it can be changed into a prime (90505489) 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 in 7 ways as a sum of consecutive naturals, for example, 9369 + ... + 16394.

It is an arithmetic number, because the mean of its divisors is an integer number (15097704).

Almost surely, 2^90505419 is an apocalyptic number.

90505419 is a deficient number, since it is larger than the sum of its proper divisors (30276213).

90505419 is a wasteful number, since it uses less digits than its factorization.

90505419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26937.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 90505419 is about 9513.4336072735. The cubic root of 90505419 is about 448.9777933240.

The spelling of 90505419 in words is "ninety million, five hundred five thousand, four hundred nineteen".