90851471 has 4 divisors (see below), whose sum is σ = 90876912. Its totient is φ = 90826032.

The previous prime is 90851443. The next prime is 90851479. The reversal of 90851471 is 17415809.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90851471 - 2¹⁰ = 90850447 is a prime.

It is a super-3 number, since 3×90851471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90851479) 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 3 ways as a sum of consecutive naturals, for example, 6275 + ... + 14868.

It is an arithmetic number, because the mean of its divisors is an integer number (22719228).

Almost surely, 2^90851471 is an apocalyptic number.

90851471 is a deficient number, since it is larger than the sum of its proper divisors (25441).

90851471 is a wasteful number, since it uses less digits than its factorization.

90851471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25440.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 90851471 is about 9531.6037999908. The cubic root of 90851471 is about 449.5492952421.

The spelling of 90851471 in words is "ninety million, eight hundred fifty-one thousand, four hundred seventy-one".