90194243 has 4 divisors (see below), whose sum is σ = 90277560. Its totient is φ = 90110928.

The previous prime is 90194233. The next prime is 90194249. The reversal of 90194243 is 34249109.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 90194243 - 2¹⁴ = 90177859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90194249) 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, 40013 + ... + 42206.

It is an arithmetic number, because the mean of its divisors is an integer number (22569390).

Almost surely, 2^90194243 is an apocalyptic number.

90194243 is a deficient number, since it is larger than the sum of its proper divisors (83317).

90194243 is a wasteful number, since it uses less digits than its factorization.

90194243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83316.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 90194243 is about 9497.0649676624. The cubic root of 90194243 is about 448.4626435489.

The spelling of 90194243 in words is "ninety million, one hundred ninety-four thousand, two hundred forty-three".