100743509 has 2 divisors, whose sum is σ = 100743510. Its totient is φ = 100743508.

The previous prime is 100743499. The next prime is 100743553. The reversal of 100743509 is 905347001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55920484 + 44823025 = 7478^2 + 6695^2 .

It is a cyclic number.

It is not a de Polignac number, because 100743509 - 2⁴ = 100743493 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100743569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50371754 + 50371755.

It is an arithmetic number, because the mean of its divisors is an integer number (50371755).

Almost surely, 2^100743509 is an apocalyptic number.

It is an amenable number.

100743509 is a deficient number, since it is larger than the sum of its proper divisors (1).

100743509 is an equidigital number, since it uses as much as digits as its factorization.

100743509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 100743509 is about 10037.1066049933. The cubic root of 100743509 is about 465.3063984409.

The spelling of 100743509 in words is "one hundred million, seven hundred forty-three thousand, five hundred nine".