100519009 has 2 divisors, whose sum is σ = 100519010. Its totient is φ = 100519008.

The previous prime is 100519007. The next prime is 100519021. The reversal of 100519009 is 900915001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76947984 + 23571025 = 8772^2 + 4855^2 .

It is a cyclic number.

It is not a de Polignac number, because 100519009 - 2¹ = 100519007 is a prime.

Together with 100519007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (100519007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50259504 + 50259505.

It is an arithmetic number, because the mean of its divisors is an integer number (50259505).

Almost surely, 2^100519009 is an apocalyptic number.

It is an amenable number.

100519009 is a deficient number, since it is larger than the sum of its proper divisors (1).

100519009 is an equidigital number, since it uses as much as digits as its factorization.

100519009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 100519009 is about 10025.9168658033. The cubic root of 100519009 is about 464.9605069168.

The spelling of 100519009 in words is "one hundred million, five hundred nineteen thousand, nine".