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695 = 5139
BaseRepresentation
bin1010110111
3221202
422313
510240
63115
72012
oct1267
9852
10695
11582
1249b
13416
14379
15315
hex2b7

695 has 4 divisors (see below), whose sum is σ = 840. Its totient is φ = 552.

The previous prime is 691. The next prime is 701. The reversal of 695 is 596.

Subtracting from 695 its reverse (596), we obtain a palindrome (99).

It can be divided in two parts, 6 and 95, that added together give a palindrome (101).

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 695 - 22 = 691 is a prime.

It is an Ulam number.

It is a plaindrome in base 8, base 12 and base 14.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65 + ... + 74.

It is an arithmetic number, because the mean of its divisors is an integer number (210).

695 is a deficient number, since it is larger than the sum of its proper divisors (145).

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

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

The sum of its prime factors is 144.

The product of its digits is 270, while the sum is 20.

The square root of 695 is about 26.3628526529. The cubic root of 695 is about 8.8578489106.

The spelling of 695 in words is "six hundred ninety-five", and thus it is an aban number and an oban number.

Divisors: 1 5 139 695