90842205 has 16 divisors (see below), whose sum is σ = 146105280. Its totient is φ = 48196608.

The previous prime is 90842201. The next prime is 90842209. The reversal of 90842205 is 50224809.

90842205 = 2238² + 2239² + ... + 2255².

It is an interprime number because it is at equal distance from previous prime (90842201) and next prime (90842209).

It is not a de Polignac number, because 90842205 - 2² = 90842201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90842201) 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, 12795 + ... + 18584.

It is an arithmetic number, because the mean of its divisors is an integer number (9131580).

Almost surely, 2^90842205 is an apocalyptic number.

It is an amenable number.

90842205 is a deficient number, since it is larger than the sum of its proper divisors (55263075).

90842205 is a wasteful number, since it uses less digits than its factorization.

90842205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31580.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 90842205 is about 9531.1177203936. The cubic root of 90842205 is about 449.5340114485.

The spelling of 90842205 in words is "ninety million, eight hundred forty-two thousand, two hundred five".