109846021 has 2 divisors, whose sum is σ = 109846022. Its totient is φ = 109846020.

The previous prime is 109846013. The next prime is 109846043. The reversal of 109846021 is 120648901.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94361796 + 15484225 = 9714^2 + 3935^2 .

It is a cyclic number.

It is not a de Polignac number, because 109846021 - 2³ = 109846013 is a prime.

It is a super-2 number, since 2×109846021² = 24132296659064882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109846621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54923010 + 54923011.

It is an arithmetic number, because the mean of its divisors is an integer number (54923011).

Almost surely, 2^109846021 is an apocalyptic number.

It is an amenable number.

109846021 is a deficient number, since it is larger than the sum of its proper divisors (1).

109846021 is an equidigital number, since it uses as much as digits as its factorization.

109846021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 109846021 is about 10480.7452502196. The cubic root of 109846021 is about 478.9183122046.

The spelling of 109846021 in words is "one hundred nine million, eight hundred forty-six thousand, twenty-one".