106921 has 2 divisors, whose sum is σ = 106922. Its totient is φ = 106920.
The previous prime is 106907. The next prime is 106937. The reversal of 106921 is 129601.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 105625 + 1296 = 325^2 + 36^2 .
It is a cyclic number.
It is not a de Polignac number, because 106921 - 213 = 98729 is a prime.
It is a super-2 number, since 2×1069212 = 22864200482, which contains 22 as substring.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (106961) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53460 + 53461.
It is an arithmetic number, because the mean of its divisors is an integer number (53461).
2106921 is an apocalyptic number.
It is an amenable number.
106921 is a deficient number, since it is larger than the sum of its proper divisors (1).
106921 is an equidigital number, since it uses as much as digits as its factorization.
106921 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 108, while the sum is 19.
The square root of 106921 is about 326.9877673553. The cubic root of 106921 is about 47.4629073300.
The spelling of 106921 in words is "one hundred six thousand, nine hundred twenty-one".
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