90380933221 has 2 divisors, whose sum is σ = 90380933222. Its totient is φ = 90380933220.

The previous prime is 90380933207. The next prime is 90380933297. The reversal of 90380933221 is 12233908309.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55295522500 + 35085410721 = 235150^2 + 187311^2 .

It is a cyclic number.

It is not a de Polignac number, because 90380933221 - 2⁵ = 90380933189 is a prime.

It is a super-2 number, since 2×90380933221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90380930221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45190466610 + 45190466611.

It is an arithmetic number, because the mean of its divisors is an integer number (45190466611).

Almost surely, 2^90380933221 is an apocalyptic number.

It is an amenable number.

90380933221 is a deficient number, since it is larger than the sum of its proper divisors (1).

90380933221 is an equidigital number, since it uses as much as digits as its factorization.

90380933221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 90380933221 in words is "ninety billion, three hundred eighty million, nine hundred thirty-three thousand, two hundred twenty-one".