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99669 = 333223
BaseRepresentation
bin11000010101010101
312001201110
4120111111
511142134
62045233
7563403
oct302525
9161643
1099669
1168979
1249819
133649b
1428473
151e7e9
hex18555

99669 has 4 divisors (see below), whose sum is σ = 132896. Its totient is φ = 66444.

The previous prime is 99667. The next prime is 99679. The reversal of 99669 is 96699.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96699 = 332233.

It is not a de Polignac number, because 99669 - 21 = 99667 is a prime.

It is a super-2 number, since 2×996692 = 19867819122, 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 (99661) 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, 16609 + ... + 16614.

It is an arithmetic number, because the mean of its divisors is an integer number (33224).

299669 is an apocalyptic number.

It is an amenable number.

99669 is a deficient number, since it is larger than the sum of its proper divisors (33227).

99669 is a wasteful number, since it uses less digits than its factorization.

99669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33226.

The product of its digits is 26244, while the sum is 39.

The square root of 99669 is about 315.7039752680. The cubic root of 99669 is about 46.3646195311.

The spelling of 99669 in words is "ninety-nine thousand, six hundred sixty-nine".

Divisors: 1 3 33223 99669