100420013 has 4 divisors (see below), whose sum is σ = 100442940. Its totient is φ = 100397088.

The previous prime is 100420009. The next prime is 100420027. The reversal of 100420013 is 310024001.

It is a happy number.

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 86899684 + 13520329 = 9322^2 + 3677^2 .

It is a cyclic number.

It is not a de Polignac number, because 100420013 - 2² = 100420009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100419976 and 100420003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100420813) 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, 2618 + ... + 14411.

It is an arithmetic number, because the mean of its divisors is an integer number (25110735).

Almost surely, 2^100420013 is an apocalyptic number.

It is an amenable number.

100420013 is a deficient number, since it is larger than the sum of its proper divisors (22927).

100420013 is an equidigital number, since it uses as much as digits as its factorization.

100420013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22926.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 100420013 is about 10020.9786448231. The cubic root of 100420013 is about 464.8078182208.

Adding to 100420013 its reverse (310024001), we get a palindrome (410444014).

The spelling of 100420013 in words is "one hundred million, four hundred twenty thousand, thirteen".