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690443 = 13173307
BaseRepresentation
bin10101000100100001011
31022002002222
42220210023
5134043233
622444255
75603645
oct2504413
91262088
10690443
11431816
1229368b
131b2360
1413d895
15d9898
hexa890b

690443 has 8 divisors (see below), whose sum is σ = 750288. Its totient is φ = 631584.

The previous prime is 690439. The next prime is 690449. The reversal of 690443 is 344096.

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 690443 - 22 = 690439 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690443.

It is not an unprimeable number, because it can be changed into a prime (690449) 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, 2096 + ... + 2402.

It is an arithmetic number, because the mean of its divisors is an integer number (93786).

2690443 is an apocalyptic number.

690443 is a deficient number, since it is larger than the sum of its proper divisors (59845).

690443 is a wasteful number, since it uses less digits than its factorization.

690443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 690443 is about 830.9289981701. The cubic root of 690443 is about 88.3844662618.

The spelling of 690443 in words is "six hundred ninety thousand, four hundred forty-three".

Divisors: 1 13 173 307 2249 3991 53111 690443