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26999 = 721929

26999 has 12 divisors (see below), whose sum is σ = 34200. Its totient is φ = 21168.

The previous prime is 26993. The next prime is 27011. The reversal of 26999 is 99962.

It is a Cunningham number, because it is equal to 303-1.

It is a de Polignac number, because none of the positive numbers 2k-26999 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

26999 is a modest number, since divided by 999 gives 26 as remainder.

It is a plaindrome in base 10 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 917 + ... + 945.

It is an arithmetic number, because the mean of its divisors is an integer number (2850).

226999 is an apocalyptic number.

26999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

26999 is a deficient number, since it is larger than the sum of its proper divisors (7201).

26999 is a wasteful number, since it uses less digits than its factorization.

26999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62 (or 55 counting only the distinct ones).

The product of its digits is 8748, while the sum is 35.

The square root of 26999 is about 164.3137243203. The cubic root of 26999 is about 29.9996296251. Note that the first 3 decimals are identical.

The spelling of 26999 in words is "twenty-six thousand, nine hundred ninety-nine".

Divisors: 1 7 19 29 49 133 203 551 931 1421 3857 26999