9090898 has 4 divisors (see below), whose sum is σ = 13636350. Its totient is φ = 4545448.

The previous prime is 9090871. The next prime is 9090901. The reversal of 9090898 is 8980909.

9090898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 4566769 + 4524129 = 2137^2 + 2127^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2272723 + ... + 2272726.

Almost surely, 2^9090898 is an apocalyptic number.

9090898 is a deficient number, since it is larger than the sum of its proper divisors (4545452).

9090898 is a wasteful number, since it uses less digits than its factorization.

9090898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545451.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 9090898 is about 3015.1116065579. Note that the first 3 decimals coincide. The cubic root of 9090898 is about 208.7063173684.

It can be divided in two parts, 9090 and 898, that multiplied together give a triangular number (8162820 = T₄₀₄₀).

The spelling of 9090898 in words is "nine million, ninety thousand, eight hundred ninety-eight".