90232321 has 2 divisors, whose sum is σ = 90232322. Its totient is φ = 90232320.

The previous prime is 90232319. The next prime is 90232327. The reversal of 90232321 is 12323209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65431921 + 24800400 = 8089^2 + 4980^2 .

It is a cyclic number.

It is not a de Polignac number, because 90232321 - 2¹ = 90232319 is a prime.

Together with 90232319, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90232292 and 90232301.

It is not a weakly prime, because it can be changed into another prime (90232327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45116160 + 45116161.

It is an arithmetic number, because the mean of its divisors is an integer number (45116161).

Almost surely, 2^90232321 is an apocalyptic number.

It is an amenable number.

90232321 is a deficient number, since it is larger than the sum of its proper divisors (1).

90232321 is an equidigital number, since it uses as much as digits as its factorization.

90232321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 90232321 is about 9499.0694807439. The cubic root of 90232321 is about 448.5257449820.

The spelling of 90232321 in words is "ninety million, two hundred thirty-two thousand, three hundred twenty-one".