9421990 has 8 divisors (see below), whose sum is σ = 16959600. Its totient is φ = 3768792.

The previous prime is 9421981. The next prime is 9422027. The reversal of 9421990 is 991249.

9421990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471090 + ... + 471109.

It is an arithmetic number, because the mean of its divisors is an integer number (2119950).

Almost surely, 2^9421990 is an apocalyptic number.

9421990 is a deficient number, since it is larger than the sum of its proper divisors (7537610).

9421990 is a wasteful number, since it uses less digits than its factorization.

9421990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942206.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 9421990 is about 3069.5260220431. The cubic root of 9421990 is about 211.2098718172.

The spelling of 9421990 in words is "nine million, four hundred twenty-one thousand, nine hundred ninety".