990807 has 8 divisors (see below), whose sum is σ = 1349376. Its totient is φ = 646392.

The previous prime is 990799. The next prime is 990809. The reversal of 990807 is 708099.

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

It is not a de Polignac number, because 990807 - 2³ = 990799 is a prime.

It is a super-2 number, since 2×990807² = 1963397022498, which contains 22 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3373 + ... + 3654.

It is an arithmetic number, because the mean of its divisors is an integer number (168672).

2⁹⁹⁰⁸⁰⁷ is an apocalyptic number.

990807 is a deficient number, since it is larger than the sum of its proper divisors (358569).

990807 is a wasteful number, since it uses less digits than its factorization.

990807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7077.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 990807 is about 995.3928872561. The cubic root of 990807 is about 99.6926228274.

The spelling of 990807 in words is "nine hundred ninety thousand, eight hundred seven".