990709 has 8 divisors (see below), whose sum is σ = 1061208. Its totient is φ = 921600.

The previous prime is 990707. The next prime is 990719. The reversal of 990709 is 907099.

It can be written as a sum of positive squares in 4 ways, for example, as 850084 + 140625 = 922^2 + 375^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 990709 - 2¹ = 990707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1429 + ... + 2005.

It is an arithmetic number, because the mean of its divisors is an integer number (132651).

2⁹⁹⁰⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

990709 is a deficient number, since it is larger than the sum of its proper divisors (70499).

990709 is a wasteful number, since it uses less digits than its factorization.

990709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 990709 is about 995.3436592454. The cubic root of 990709 is about 99.6893358775.

The spelling of 990709 in words is "nine hundred ninety thousand, seven hundred nine".