90471497 has 2 divisors, whose sum is σ = 90471498. Its totient is φ = 90471496.

The previous prime is 90471487. The next prime is 90471533. The reversal of 90471497 is 79417409.

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., 67584841 + 22886656 = 8221^2 + 4784^2 .

It is an emirp because it is prime and its reverse (79417409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90471497 - 2⁴ = 90471481 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90471487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45235748 + 45235749.

It is an arithmetic number, because the mean of its divisors is an integer number (45235749).

Almost surely, 2^90471497 is an apocalyptic number.

It is an amenable number.

90471497 is a deficient number, since it is larger than the sum of its proper divisors (1).

90471497 is an equidigital number, since it uses as much as digits as its factorization.

90471497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 90471497 is about 9511.6505928256. The cubic root of 90471497 is about 448.9216930814.

The spelling of 90471497 in words is "ninety million, four hundred seventy-one thousand, four hundred ninety-seven".