9090194 has 4 divisors (see below), whose sum is σ = 13635294. Its totient is φ = 4545096.

The previous prime is 9090181. The next prime is 9090203. The reversal of 9090194 is 4910909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4910909 = 17 ⋅288877.

It can be written as a sum of positive squares in only one way, i.e., 7912969 + 1177225 = 2813^2 + 1085^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9090194.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2272547 + ... + 2272550.

Almost surely, 2^9090194 is an apocalyptic number.

9090194 is a deficient number, since it is larger than the sum of its proper divisors (4545100).

9090194 is a wasteful number, since it uses less digits than its factorization.

9090194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545099.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 9090194 is about 3014.9948590338. The cubic root of 9090194 is about 208.7009298170.

The spelling of 9090194 in words is "nine million, ninety thousand, one hundred ninety-four".