109006421 has 2 divisors, whose sum is σ = 109006422. Its totient is φ = 109006420.

The previous prime is 109006409. The next prime is 109006459. The reversal of 109006421 is 124600901.

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., 108451396 + 555025 = 10414^2 + 745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109006421 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 (109006481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54503210 + 54503211.

It is an arithmetic number, because the mean of its divisors is an integer number (54503211).

Almost surely, 2^109006421 is an apocalyptic number.

It is an amenable number.

109006421 is a deficient number, since it is larger than the sum of its proper divisors (1).

109006421 is an equidigital number, since it uses as much as digits as its factorization.

109006421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 109006421 is about 10440.6140145108. The cubic root of 109006421 is about 477.6949977950.

The spelling of 109006421 in words is "one hundred nine million, six thousand, four hundred twenty-one".