90443919 has 8 divisors (see below), whose sum is σ = 120643120. Its totient is φ = 60270336.

The previous prime is 90443897. The next prime is 90443963. The reversal of 90443919 is 91934409.

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

It is not a de Polignac number, because 90443919 - 2⁵ = 90443887 is a prime.

It is a super-2 number, since 2×90443919² = 16360204968157122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90443999) 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, 4479 + ... + 14175.

It is an arithmetic number, because the mean of its divisors is an integer number (15080390).

Almost surely, 2^90443919 is an apocalyptic number.

90443919 is a deficient number, since it is larger than the sum of its proper divisors (30199201).

90443919 is a wasteful number, since it uses less digits than its factorization.

90443919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12809.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 90443919 is about 9510.2007865239. The cubic root of 90443919 is about 448.8760742179.

The spelling of 90443919 in words is "ninety million, four hundred forty-three thousand, nine hundred nineteen".