100209539 has 2 divisors, whose sum is σ = 100209540. Its totient is φ = 100209538.

The previous prime is 100209533. The next prime is 100209541. The reversal of 100209539 is 935902001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100209539 - 2⁴ = 100209523 is a prime.

Together with 100209541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100209533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50104769 + 50104770.

It is an arithmetic number, because the mean of its divisors is an integer number (50104770).

Almost surely, 2^100209539 is an apocalyptic number.

100209539 is a deficient number, since it is larger than the sum of its proper divisors (1).

100209539 is an equidigital number, since it uses as much as digits as its factorization.

100209539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 100209539 is about 10010.4714674185. The cubic root of 100209539 is about 464.4828551450.

The spelling of 100209539 in words is "one hundred million, two hundred nine thousand, five hundred thirty-nine".