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990697 = 2513947
BaseRepresentation
bin11110001110111101001
31212022222111
43301313221
5223200242
633122321
711264221
oct3616751
91768874
10990697
11617364
123b93a1
13288c16
141bb081
15148817
hexf1de9

990697 has 4 divisors (see below), whose sum is σ = 994896. Its totient is φ = 986500.

The previous prime is 990673. The next prime is 990707. The reversal of 990697 is 796099.

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, and also an emirpimes, since its reverse is a distinct semiprime: 796099 = 2334613.

It is a cyclic number.

It is not a de Polignac number, because 990697 - 211 = 988649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990637) 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 3 ways as a sum of consecutive naturals, for example, 1723 + ... + 2224.

It is an arithmetic number, because the mean of its divisors is an integer number (248724).

2990697 is an apocalyptic number.

It is an amenable number.

990697 is a deficient number, since it is larger than the sum of its proper divisors (4199).

990697 is a wasteful number, since it uses less digits than its factorization.

990697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 990697 is about 995.3376311584. The cubic root of 990697 is about 99.6889333789.

The spelling of 990697 in words is "nine hundred ninety thousand, six hundred ninety-seven".

Divisors: 1 251 3947 990697