Search a number
-
+
1697985 = 32597389
BaseRepresentation
bin110011110100011000001
310012021012100
412132203001
5413313420
6100221013
720301252
oct6364301
93167170
101697985
11a5a7a3
1269a769
13475b33
14322b29
15238190
hex19e8c1

1697985 has 24 divisors (see below), whose sum is σ = 2981160. Its totient is φ = 893952.

The previous prime is 1697959. The next prime is 1697987. The reversal of 1697985 is 5897961.

It can be written as a sum of positive squares in 4 ways, for example, as 41616 + 1656369 = 204^2 + 1287^2 .

It is not a de Polignac number, because 1697985 - 25 = 1697953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1697985.

It is not an unprimeable number, because it can be changed into a prime (1697987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4171 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (124215).

21697985 is an apocalyptic number.

1697985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1697985 is a deficient number, since it is larger than the sum of its proper divisors (1283175).

1697985 is a wasteful number, since it uses less digits than its factorization.

1697985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 494 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 1697985 is about 1303.0675347042. The cubic root of 1697985 is about 119.3011462630.

The spelling of 1697985 in words is "one million, six hundred ninety-seven thousand, nine hundred eighty-five".

Divisors: 1 3 5 9 15 45 97 291 389 485 873 1167 1455 1945 3501 4365 5835 17505 37733 113199 188665 339597 565995 1697985