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99965 = 519993
BaseRepresentation
bin11000011001111101
312002010102
4120121331
511144330
62050445
7564305
oct303175
9162112
1099965
1169118
1249a25
1336668
1428605
151e945
hex1867d

99965 has 4 divisors (see below), whose sum is σ = 119964. Its totient is φ = 79968.

The previous prime is 99961. The next prime is 99971. The reversal of 99965 is 56999.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47524 + 52441 = 218^2 + 229^2 .

It is a cyclic number.

It is not a de Polignac number, because 99965 - 22 = 99961 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 13.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99961) 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, 9992 + ... + 10001.

It is an arithmetic number, because the mean of its divisors is an integer number (29991).

299965 is an apocalyptic number.

It is an amenable number.

99965 is a deficient number, since it is larger than the sum of its proper divisors (19999).

99965 is a wasteful number, since it uses less digits than its factorization.

99965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19998.

The product of its digits is 21870, while the sum is 38.

The square root of 99965 is about 316.1724213147. The cubic root of 99965 is about 46.4104725173.

It can be divided in two parts, 9996 and 5, that added together give a palindrome (10001).

The spelling of 99965 in words is "ninety-nine thousand, nine hundred sixty-five".

Divisors: 1 5 19993 99965