90679321 has 4 divisors (see below), whose sum is σ = 90723892. Its totient is φ = 90634752.

The previous prime is 90679319. The next prime is 90679327. The reversal of 90679321 is 12397609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12397609 = 7 ⋅1771087.

It can be written as a sum of positive squares in 2 ways, for example, as 23619600 + 67059721 = 4860^2 + 8189^2 .

It is a cyclic number.

It is not a de Polignac number, because 90679321 - 2¹ = 90679319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90679327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19080 + ... + 23353.

It is an arithmetic number, because the mean of its divisors is an integer number (22680973).

Almost surely, 2^90679321 is an apocalyptic number.

It is an amenable number.

90679321 is a deficient number, since it is larger than the sum of its proper divisors (44571).

90679321 is a wasteful number, since it uses less digits than its factorization.

90679321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44570.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 90679321 is about 9522.5690336169. The cubic root of 90679321 is about 449.2651727338.

The spelling of 90679321 in words is "ninety million, six hundred seventy-nine thousand, three hundred twenty-one".