100432009 has 2 divisors, whose sum is σ = 100432010. Its totient is φ = 100432008.

The previous prime is 100431973. The next prime is 100432021. The reversal of 100432009 is 900234001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97456384 + 2975625 = 9872^2 + 1725^2 .

It is an emirp because it is prime and its reverse (900234001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100432009 - 2⁹ = 100431497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100432049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50216004 + 50216005.

It is an arithmetic number, because the mean of its divisors is an integer number (50216005).

Almost surely, 2^100432009 is an apocalyptic number.

It is an amenable number.

100432009 is a deficient number, since it is larger than the sum of its proper divisors (1).

100432009 is an equidigital number, since it uses as much as digits as its factorization.

100432009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 100432009 is about 10021.5771712840. The cubic root of 100432009 is about 464.8263258616.

The spelling of 100432009 in words is "one hundred million, four hundred thirty-two thousand, nine".