90646447 has 2 divisors, whose sum is σ = 90646448. Its totient is φ = 90646446.

The previous prime is 90646421. The next prime is 90646469. The reversal of 90646447 is 74464609.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90646447 - 2⁷ = 90646319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90646477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45323223 + 45323224.

It is an arithmetic number, because the mean of its divisors is an integer number (45323224).

Almost surely, 2^90646447 is an apocalyptic number.

90646447 is a deficient number, since it is larger than the sum of its proper divisors (1).

90646447 is an equidigital number, since it uses as much as digits as its factorization.

90646447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 90646447 is about 9520.8427673184. The cubic root of 90646447 is about 449.2108754282.

The spelling of 90646447 in words is "ninety million, six hundred forty-six thousand, four hundred forty-seven".