90692321 has 2 divisors, whose sum is σ = 90692322. Its totient is φ = 90692320.

The previous prime is 90692311. The next prime is 90692323. The reversal of 90692321 is 12329609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69889600 + 20802721 = 8360^2 + 4561^2 .

It is a cyclic number.

It is not a de Polignac number, because 90692321 - 2⁶ = 90692257 is a prime.

Together with 90692323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90692323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45346160 + 45346161.

It is an arithmetic number, because the mean of its divisors is an integer number (45346161).

Almost surely, 2^90692321 is an apocalyptic number.

It is an amenable number.

90692321 is a deficient number, since it is larger than the sum of its proper divisors (1).

90692321 is an equidigital number, since it uses as much as digits as its factorization.

90692321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 90692321 is about 9523.2515980625. The cubic root of 90692321 is about 449.2866409440.

The spelling of 90692321 in words is "ninety million, six hundred ninety-two thousand, three hundred twenty-one".