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990609 = 3330203
BaseRepresentation
bin11110001110110010001
31212022212020
43301312101
5223144414
633122053
711264034
oct3616621
91768766
10990609
11617294
123b9329
13288b79
141bb01b
151487a9
hexf1d91

990609 has 4 divisors (see below), whose sum is σ = 1320816. Its totient is φ = 660404.

The previous prime is 990599. The next prime is 990631. The reversal of 990609 is 906099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 990609 - 24 = 990593 is a prime.

It is a super-3 number, since 3×9906093 = 2916272233327309587, which contains 333 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 990609.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165099 + ... + 165104.

It is an arithmetic number, because the mean of its divisors is an integer number (330204).

2990609 is an apocalyptic number.

It is an amenable number.

990609 is a deficient number, since it is larger than the sum of its proper divisors (330207).

990609 is a wasteful number, since it uses less digits than its factorization.

990609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330206.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 990609 is about 995.2934240715. The cubic root of 990609 is about 99.6859816234.

The spelling of 990609 in words is "nine hundred ninety thousand, six hundred nine".

Divisors: 1 3 330203 990609