100809423 has 96 divisors (see below), whose sum is σ = 184242240. Its totient is φ = 52254720.

The previous prime is 100809409. The next prime is 100809463. The reversal of 100809423 is 324908001.

It is not a de Polignac number, because 100809423 - 2¹⁰ = 100808399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100809463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1380915 + ... + 1380987.

It is an arithmetic number, because the mean of its divisors is an integer number (1919190).

Almost surely, 2^100809423 is an apocalyptic number.

100809423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

100809423 is a deficient number, since it is larger than the sum of its proper divisors (83432817).

100809423 is a wasteful number, since it uses less digits than its factorization.

100809423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 100809423 is about 10040.3895840749. The cubic root of 100809423 is about 465.4078558276.

It can be divided in two parts, 10080 and 9423, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 100809423 in words is "one hundred million, eight hundred nine thousand, four hundred twenty-three".