90636471 has 24 divisors (see below), whose sum is σ = 132986880. Its totient is φ = 59479056.

The previous prime is 90636451. The next prime is 90636473. The reversal of 90636471 is 17463609.

90636471 is a `hidden beast` number, since 9 + 0 + 6 + 3 + 647 + 1 = 666.

It is not a de Polignac number, because 90636471 - 2⁵ = 90636439 is a prime.

It is a super-3 number, since 3×90636471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90636473) 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 in 23 ways as a sum of consecutive naturals, for example, 204376 + ... + 204818.

It is an arithmetic number, because the mean of its divisors is an integer number (5541120).

Almost surely, 2^90636471 is an apocalyptic number.

90636471 is a deficient number, since it is larger than the sum of its proper divisors (42350409).

90636471 is a wasteful number, since it uses less digits than its factorization.

90636471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 90636471 is about 9520.3188497025. The cubic root of 90636471 is about 449.1943956792.

The spelling of 90636471 in words is "ninety million, six hundred thirty-six thousand, four hundred seventy-one".