100232009 has 2 divisors, whose sum is σ = 100232010. Its totient is φ = 100232008.

The previous prime is 100231997. The next prime is 100232023. The reversal of 100232009 is 900232001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54804409 + 45427600 = 7403^2 + 6740^2 .

It is an emirp because it is prime and its reverse (900232001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100232009 - 2²⁰ = 99183433 is a prime.

It is not a weakly prime, because it can be changed into another prime (100231009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50116004 + 50116005.

It is an arithmetic number, because the mean of its divisors is an integer number (50116005).

Almost surely, 2^100232009 is an apocalyptic number.

It is an amenable number.

100232009 is a deficient number, since it is larger than the sum of its proper divisors (1).

100232009 is an equidigital number, since it uses as much as digits as its factorization.

100232009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 100232009 is about 10011.5937292721. The cubic root of 100232009 is about 464.5175695706.

The spelling of 100232009 in words is "one hundred million, two hundred thirty-two thousand, nine".