90820241 has 4 divisors (see below), whose sum is σ = 90969012. Its totient is φ = 90671472.

The previous prime is 90820231. The next prime is 90820243. The reversal of 90820241 is 14202809.

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 26884225 + 63936016 = 5185^2 + 7996^2 .

It is a cyclic number.

It is not a de Polignac number, because 90820241 - 2¹⁰ = 90819217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90820241.

It is not an unprimeable number, because it can be changed into a prime (90820243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73466 + ... + 74691.

It is an arithmetic number, because the mean of its divisors is an integer number (22742253).

Almost surely, 2^90820241 is an apocalyptic number.

It is an amenable number.

90820241 is a deficient number, since it is larger than the sum of its proper divisors (148771).

90820241 is a wasteful number, since it uses less digits than its factorization.

90820241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148770.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 90820241 is about 9529.9654249110. The cubic root of 90820241 is about 449.4977788006.

The spelling of 90820241 in words is "ninety million, eight hundred twenty thousand, two hundred forty-one".