90506471 has 4 divisors (see below), whose sum is σ = 98734344. Its totient is φ = 82278600.

The previous prime is 90506467. The next prime is 90506473. The reversal of 90506471 is 17460509.

It is a happy number.

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 90506471 - 2² = 90506467 is a prime.

It is a super-3 number, since 3×90506471³ (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 (90506473) 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, 4113920 + ... + 4113941.

It is an arithmetic number, because the mean of its divisors is an integer number (24683586).

Almost surely, 2^90506471 is an apocalyptic number.

90506471 is a deficient number, since it is larger than the sum of its proper divisors (8227873).

90506471 is a wasteful number, since it uses less digits than its factorization.

90506471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8227872.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 90506471 is about 9513.4888973499. The cubic root of 90506471 is about 448.9795328987.

The spelling of 90506471 in words is "ninety million, five hundred six thousand, four hundred seventy-one".