90655573 has 2 divisors, whose sum is σ = 90655574. Its totient is φ = 90655572.

The previous prime is 90655571. The next prime is 90655597. The reversal of 90655573 is 37555609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90497169 + 158404 = 9513^2 + 398^2 .

It is a cyclic number.

It is not a de Polignac number, because 90655573 - 2¹ = 90655571 is a prime.

Together with 90655571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90655571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45327786 + 45327787.

It is an arithmetic number, because the mean of its divisors is an integer number (45327787).

Almost surely, 2^90655573 is an apocalyptic number.

It is an amenable number.

90655573 is a deficient number, since it is larger than the sum of its proper divisors (1).

90655573 is an equidigital number, since it uses as much as digits as its factorization.

90655573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141750, while the sum is 40.

The square root of 90655573 is about 9521.3220195517. The cubic root of 90655573 is about 449.2259499697.

The spelling of 90655573 in words is "ninety million, six hundred fifty-five thousand, five hundred seventy-three".