100420423 has 2 divisors, whose sum is σ = 100420424. Its totient is φ = 100420422.

The previous prime is 100420421. The next prime is 100420427. The reversal of 100420423 is 324024001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100420423 - 2¹ = 100420421 is a prime.

It is a super-2 number, since 2×100420423² = 20168522710997858, which contains 22 as substring.

Together with 100420421, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 100420397 and 100420406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100420421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50210211 + 50210212.

It is an arithmetic number, because the mean of its divisors is an integer number (50210212).

Almost surely, 2^100420423 is an apocalyptic number.

100420423 is a deficient number, since it is larger than the sum of its proper divisors (1).

100420423 is an equidigital number, since it uses as much as digits as its factorization.

100420423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 100420423 is about 10020.9991018860. Note that the first 3 decimals coincide. The cubic root of 100420423 is about 464.8084508004.

Adding to 100420423 its reverse (324024001), we get a palindrome (424444424).

The spelling of 100420423 in words is "one hundred million, four hundred twenty thousand, four hundred twenty-three".