90471533 has 2 divisors, whose sum is σ = 90471534. Its totient is φ = 90471532.

The previous prime is 90471497. The next prime is 90471593. The reversal of 90471533 is 33517409.

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., 81956809 + 8514724 = 9053^2 + 2918^2 .

It is a cyclic number.

It is not a de Polignac number, because 90471533 - 2¹² = 90467437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90471533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90471593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45235766 + 45235767.

It is an arithmetic number, because the mean of its divisors is an integer number (45235767).

Almost surely, 2^90471533 is an apocalyptic number.

It is an amenable number.

90471533 is a deficient number, since it is larger than the sum of its proper divisors (1).

90471533 is an equidigital number, since it uses as much as digits as its factorization.

90471533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 90471533 is about 9511.6524852415. The cubic root of 90471533 is about 448.9217526257.

The spelling of 90471533 in words is "ninety million, four hundred seventy-one thousand, five hundred thirty-three".