90481801 has 4 divisors (see below), whose sum is σ = 90501012. Its totient is φ = 90462592.

The previous prime is 90481799. The next prime is 90481817. The reversal of 90481801 is 10818409.

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

It can be written as a sum of positive squares in 2 ways, for example, as 79192201 + 11289600 = 8899^2 + 3360^2 .

It is a cyclic number.

It is not a de Polignac number, because 90481801 - 2¹ = 90481799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90481861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2805 + ... + 13741.

It is an arithmetic number, because the mean of its divisors is an integer number (22625253).

Almost surely, 2^90481801 is an apocalyptic number.

It is an amenable number.

90481801 is a deficient number, since it is larger than the sum of its proper divisors (19211).

90481801 is a wasteful number, since it uses less digits than its factorization.

90481801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19210.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 90481801 is about 9512.1922289239. The cubic root of 90481801 is about 448.9387353311.

The spelling of 90481801 in words is "ninety million, four hundred eighty-one thousand, eight hundred one".