9709990 has 8 divisors (see below), whose sum is σ = 17478000. Its totient is φ = 3883992.

The previous prime is 9709963. The next prime is 9709993. The reversal of 9709990 is 999079.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9709993) 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, 485490 + ... + 485509.

It is an arithmetic number, because the mean of its divisors is an integer number (2184750).

Almost surely, 2^9709990 is an apocalyptic number.

9709990 is a deficient number, since it is larger than the sum of its proper divisors (7768010).

9709990 is a wasteful number, since it uses less digits than its factorization.

9709990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971006.

The product of its (nonzero) digits is 45927, while the sum is 43.

The square root of 9709990 is about 3116.0856855998. The cubic root of 9709990 is about 213.3403128142.

The spelling of 9709990 in words is "nine million, seven hundred nine thousand, nine hundred ninety".