100768509 has 8 divisors (see below), whose sum is σ = 149286720. Its totient is φ = 67178988.

The previous prime is 100768489. The next prime is 100768511. The reversal of 100768509 is 905867001.

It is not a de Polignac number, because 100768509 - 2⁵ = 100768477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100768009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1866057 + ... + 1866110.

It is an arithmetic number, because the mean of its divisors is an integer number (18660840).

Almost surely, 2^100768509 is an apocalyptic number.

It is an amenable number.

100768509 is a deficient number, since it is larger than the sum of its proper divisors (48518211).

100768509 is an equidigital number, since it uses as much as digits as its factorization.

100768509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732176 (or 3732170 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 100768509 is about 10038.3519065631. The cubic root of 100768509 is about 465.3448846189.

The spelling of 100768509 in words is "one hundred million, seven hundred sixty-eight thousand, five hundred nine".