100439305 has 4 divisors (see below), whose sum is σ = 120527172. Its totient is φ = 80351440.

The previous prime is 100439291. The next prime is 100439351. The reversal of 100439305 is 503934001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22240656 + 78198649 = 4716^2 + 8843^2 .

It is not a de Polignac number, because 100439305 - 2¹³ = 100431113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100439305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10043926 + ... + 10043935.

It is an arithmetic number, because the mean of its divisors is an integer number (30131793).

Almost surely, 2^100439305 is an apocalyptic number.

It is an amenable number.

100439305 is a deficient number, since it is larger than the sum of its proper divisors (20087867).

100439305 is an equidigital number, since it uses as much as digits as its factorization.

100439305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20087866.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 100439305 is about 10021.9411792327. The cubic root of 100439305 is about 464.8375815386.

The spelling of 100439305 in words is "one hundred million, four hundred thirty-nine thousand, three hundred five".