109240421 has 2 divisors, whose sum is σ = 109240422. Its totient is φ = 109240420.

The previous prime is 109240403. The next prime is 109240427. The reversal of 109240421 is 124042901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56460196 + 52780225 = 7514^2 + 7265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109240421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109240427) 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, 54620210 + 54620211.

It is an arithmetic number, because the mean of its divisors is an integer number (54620211).

Almost surely, 2^109240421 is an apocalyptic number.

It is an amenable number.

109240421 is a deficient number, since it is larger than the sum of its proper divisors (1).

109240421 is an equidigital number, since it uses as much as digits as its factorization.

109240421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 109240421 is about 10451.8142444267. The cubic root of 109240421 is about 478.0365701496.

The spelling of 109240421 in words is "one hundred nine million, two hundred forty thousand, four hundred twenty-one".