90844261 has 2 divisors, whose sum is σ = 90844262. Its totient is φ = 90844260.

The previous prime is 90844231. The next prime is 90844321. The reversal of 90844261 is 16244809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59136100 + 31708161 = 7690^2 + 5631^2 .

It is a cyclic number.

It is not a de Polignac number, because 90844261 - 2⁷ = 90844133 is a prime.

It is a super-2 number, since 2×90844261² = 16505359513272242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90844231) 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 as a sum of consecutive naturals, namely, 45422130 + 45422131.

It is an arithmetic number, because the mean of its divisors is an integer number (45422131).

Almost surely, 2^90844261 is an apocalyptic number.

It is an amenable number.

90844261 is a deficient number, since it is larger than the sum of its proper divisors (1).

90844261 is an equidigital number, since it uses as much as digits as its factorization.

90844261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 90844261 is about 9531.2255770179. The cubic root of 90844261 is about 449.5374028052.

The spelling of 90844261 in words is "ninety million, eight hundred forty-four thousand, two hundred sixty-one".