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87069 = 329023
BaseRepresentation
bin10101010000011101
311102102210
4111100131
510241234
61511033
7511563
oct252035
9142383
1087069
115a464
1242479
1330828
1423a33
151abe9
hex1541d

87069 has 4 divisors (see below), whose sum is σ = 116096. Its totient is φ = 58044.

The previous prime is 87049. The next prime is 87071. The reversal of 87069 is 96078.

It is a happy number.

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 not a de Polignac number, because 87069 - 25 = 87037 is a prime.

It is a super-2 number, since 2×870692 = 15162021522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14509 + ... + 14514.

It is an arithmetic number, because the mean of its divisors is an integer number (29024).

287069 is an apocalyptic number.

It is an amenable number.

87069 is a deficient number, since it is larger than the sum of its proper divisors (29027).

87069 is a wasteful number, since it uses less digits than its factorization.

87069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29026.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 87069 is about 295.0745668471. The cubic root of 87069 is about 44.3221873853.

Subtracting 87069 from its reverse (96078), we obtain a palindrome (9009).

It can be divided in two parts, 870 and 69, that added together give a palindrome (939).

The spelling of 87069 in words is "eighty-seven thousand, sixty-nine".

Divisors: 1 3 29023 87069