106503821 has 2 divisors, whose sum is σ = 106503822. Its totient is φ = 106503820.

The previous prime is 106503737. The next prime is 106503877. The reversal of 106503821 is 128305601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80748196 + 25755625 = 8986^2 + 5075^2 .

It is an emirp because it is prime and its reverse (128305601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 106503821 - 2¹⁰ = 106502797 is a prime.

It is a super-2 number, since 2×106503821² = 22686127775200082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106503421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53251910 + 53251911.

It is an arithmetic number, because the mean of its divisors is an integer number (53251911).

Almost surely, 2^106503821 is an apocalyptic number.

It is an amenable number.

106503821 is a deficient number, since it is larger than the sum of its proper divisors (1).

106503821 is an equidigital number, since it uses as much as digits as its factorization.

106503821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 106503821 is about 10320.0688466696. The cubic root of 106503821 is about 474.0109740675.

The spelling of 106503821 in words is "one hundred six million, five hundred three thousand, eight hundred twenty-one".