106428809 has 2 divisors, whose sum is σ = 106428810. Its totient is φ = 106428808.

The previous prime is 106428793. The next prime is 106428853. The reversal of 106428809 is 908824601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106399225 + 29584 = 10315^2 + 172^2 .

It is an emirp because it is prime and its reverse (908824601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 106428809 - 2⁴ = 106428793 is a prime.

It is a super-2 number, since 2×106428809² = 22654182770316962, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (106428409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53214404 + 53214405.

It is an arithmetic number, because the mean of its divisors is an integer number (53214405).

Almost surely, 2^106428809 is an apocalyptic number.

It is an amenable number.

106428809 is a deficient number, since it is larger than the sum of its proper divisors (1).

106428809 is an equidigital number, since it uses as much as digits as its factorization.

106428809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 106428809 is about 10316.4339284464. The cubic root of 106428809 is about 473.8996639387.

The spelling of 106428809 in words is "one hundred six million, four hundred twenty-eight thousand, eight hundred nine".