90511447 has 4 divisors (see below), whose sum is σ = 97473880. Its totient is φ = 83549016.

The previous prime is 90511433. The next prime is 90511457. The reversal of 90511447 is 74411509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74411509 = 23 ⋅3235283.

It is a cyclic number.

It is not a de Polignac number, because 90511447 - 2⁷ = 90511319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90511427) 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, 3481197 + ... + 3481222.

It is an arithmetic number, because the mean of its divisors is an integer number (24368470).

Almost surely, 2^90511447 is an apocalyptic number.

90511447 is a deficient number, since it is larger than the sum of its proper divisors (6962433).

90511447 is a wasteful number, since it uses less digits than its factorization.

90511447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6962432.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 90511447 is about 9513.7504171594. The cubic root of 90511447 is about 448.9877609705.

The spelling of 90511447 in words is "ninety million, five hundred eleven thousand, four hundred forty-seven".