100055509 has 2 divisors, whose sum is σ = 100055510. Its totient is φ = 100055508.

The previous prime is 100055441. The next prime is 100055531. The reversal of 100055509 is 905550001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97574884 + 2480625 = 9878^2 + 1575^2 .

It is a cyclic number.

It is not a de Polignac number, because 100055509 - 2⁷ = 100055381 is a prime.

It is a super-2 number, since 2×100055509² = 20022209762498162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100055009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50027754 + 50027755.

It is an arithmetic number, because the mean of its divisors is an integer number (50027755).

Almost surely, 2^100055509 is an apocalyptic number.

It is an amenable number.

100055509 is a deficient number, since it is larger than the sum of its proper divisors (1).

100055509 is an equidigital number, since it uses as much as digits as its factorization.

100055509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 100055509 is about 10002.7750649507. The cubic root of 100055509 is about 464.2447507934.

The spelling of 100055509 in words is "one hundred million, fifty-five thousand, five hundred nine".