100809719 has 4 divisors (see below), whose sum is σ = 103534344. Its totient is φ = 98085096.

The previous prime is 100809707. The next prime is 100809727. The reversal of 100809719 is 917908001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100809719 - 2⁴ = 100809703 is a prime.

It is a super-2 number, since 2×100809719² = 20325198889717922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100809749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1362257 + ... + 1362330.

It is an arithmetic number, because the mean of its divisors is an integer number (25883586).

Almost surely, 2^100809719 is an apocalyptic number.

100809719 is a deficient number, since it is larger than the sum of its proper divisors (2724625).

100809719 is an equidigital number, since it uses as much as digits as its factorization.

100809719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724624.

The product of its (nonzero) digits is 4536, while the sum is 35.

The square root of 100809719 is about 10040.4043245280. The cubic root of 100809719 is about 465.4083113425.

The spelling of 100809719 in words is "one hundred million, eight hundred nine thousand, seven hundred nineteen".