100523809 has 8 divisors (see below), whose sum is σ = 104021280. Its totient is φ = 97079136.

The previous prime is 100523789. The next prime is 100523821. The reversal of 100523809 is 908325001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100523809 - 2⁷ = 100523681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100523009) 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, 9307 + ... + 16960.

It is an arithmetic number, because the mean of its divisors is an integer number (13002660).

Almost surely, 2^100523809 is an apocalyptic number.

It is an amenable number.

100523809 is a deficient number, since it is larger than the sum of its proper divisors (3497471).

100523809 is an equidigital number, since it uses as much as digits as its factorization.

100523809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26399.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 100523809 is about 10026.1562425488. The cubic root of 100523809 is about 464.9679077555.

It can be divided in two parts, 10052 and 3809, that added together give a triangular number (13861 = T₁₆₆).

The spelling of 100523809 in words is "one hundred million, five hundred twenty-three thousand, eight hundred nine".