109821403 has 2 divisors, whose sum is σ = 109821404. Its totient is φ = 109821402.

The previous prime is 109821401. The next prime is 109821407. The reversal of 109821403 is 304128901.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109821403 - 2¹ = 109821401 is a prime.

Together with 109821401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (109821401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54910701 + 54910702.

It is an arithmetic number, because the mean of its divisors is an integer number (54910702).

Almost surely, 2^109821403 is an apocalyptic number.

109821403 is a deficient number, since it is larger than the sum of its proper divisors (1).

109821403 is an equidigital number, since it uses as much as digits as its factorization.

109821403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 109821403 is about 10479.5707450258. The cubic root of 109821403 is about 478.8825321439.

It can be divided in two parts, 109821 and 403, that added together give a square (110224 = 332²).

The spelling of 109821403 in words is "one hundred nine million, eight hundred twenty-one thousand, four hundred three".