90811433 has 16 divisors (see below), whose sum is σ = 99456336. Its totient is φ = 82575360.

The previous prime is 90811421. The next prime is 90811439. The reversal of 90811433 is 33411809.

It can be written as a sum of positive squares in 8 ways, for example, as 8219689 + 82591744 = 2867^2 + 9088^2 .

It is a cyclic number.

It is not a de Polignac number, because 90811433 - 2²⁰ = 89762857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90811396 and 90811405.

It is not an unprimeable number, because it can be changed into a prime (90811439) 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 15 ways as a sum of consecutive naturals, for example, 78185 + ... + 79337.

It is an arithmetic number, because the mean of its divisors is an integer number (6216021).

Almost surely, 2^90811433 is an apocalyptic number.

It is an amenable number.

90811433 is a deficient number, since it is larger than the sum of its proper divisors (8644903).

90811433 is a wasteful number, since it uses less digits than its factorization.

90811433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 90811433 is about 9529.5032924072. The cubic root of 90811433 is about 449.4832471486.

The spelling of 90811433 in words is "ninety million, eight hundred eleven thousand, four hundred thirty-three".