100405727 has 4 divisors (see below), whose sum is σ = 100425840. Its totient is φ = 100385616.

The previous prime is 100405703. The next prime is 100405729. The reversal of 100405727 is 727504001.

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 100405727 - 2⁸ = 100405471 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100405696 and 100405705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100405729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3758 + ... + 14660.

It is an arithmetic number, because the mean of its divisors is an integer number (25106460).

Almost surely, 2^100405727 is an apocalyptic number.

100405727 is a deficient number, since it is larger than the sum of its proper divisors (20113).

100405727 is an equidigital number, since it uses as much as digits as its factorization.

100405727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20112.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 100405727 is about 10020.2658148374. The cubic root of 100405727 is about 464.7857756047.

Adding to 100405727 its reverse (727504001), we get a palindrome (827909728).

The spelling of 100405727 in words is "one hundred million, four hundred five thousand, seven hundred twenty-seven".