90045321 has 8 divisors (see below), whose sum is σ = 120131904. Its totient is φ = 59994480.

The previous prime is 90045317. The next prime is 90045323. The reversal of 90045321 is 12354009.

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

It is not a de Polignac number, because 90045321 - 2² = 90045317 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 90045291 and 90045300.

It is not an unprimeable number, because it can be changed into a prime (90045323) 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, 2365 + ... + 13626.

It is an arithmetic number, because the mean of its divisors is an integer number (15016488).

Almost surely, 2^90045321 is an apocalyptic number.

It is an amenable number.

90045321 is a deficient number, since it is larger than the sum of its proper divisors (30086583).

90045321 is a wasteful number, since it uses less digits than its factorization.

90045321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17871.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 90045321 is about 9489.2213063033. The cubic root of 90045321 is about 448.2156849010.

The spelling of 90045321 in words is "ninety million, forty-five thousand, three hundred twenty-one".