105504991 has 2 divisors, whose sum is σ = 105504992. Its totient is φ = 105504990.

The previous prime is 105504983. The next prime is 105505007. The reversal of 105504991 is 199405501.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105504991 - 2³ = 105504983 is a prime.

It is a super-2 number, since 2×105504991² = 22262606251820162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105504901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52752495 + 52752496.

It is an arithmetic number, because the mean of its divisors is an integer number (52752496).

Almost surely, 2^105504991 is an apocalyptic number.

105504991 is a deficient number, since it is larger than the sum of its proper divisors (1).

105504991 is an equidigital number, since it uses as much as digits as its factorization.

105504991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 105504991 is about 10271.5622472923. The cubic root of 105504991 is about 472.5245040155.

The spelling of 105504991 in words is "one hundred five million, five hundred four thousand, nine hundred ninety-one".