90988219 has 4 divisors (see below), whose sum is σ = 103986544. Its totient is φ = 77989896.

The previous prime is 90988189. The next prime is 90988229. The reversal of 90988219 is 91288909.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90988219 - 2⁵ = 90988187 is a prime.

It is a super-2 number, since 2×90988219² = 16557711993583922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90988229) 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 3 ways as a sum of consecutive naturals, for example, 6499152 + ... + 6499165.

It is an arithmetic number, because the mean of its divisors is an integer number (25996636).

Almost surely, 2^90988219 is an apocalyptic number.

90988219 is a deficient number, since it is larger than the sum of its proper divisors (12998325).

90988219 is a wasteful number, since it uses less digits than its factorization.

90988219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12998324.

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 90988219 is about 9538.7745019997. The cubic root of 90988219 is about 449.7747333425.

The spelling of 90988219 in words is "ninety million, nine hundred eighty-eight thousand, two hundred nineteen".