100420447 has 2 divisors, whose sum is σ = 100420448. Its totient is φ = 100420446.

The previous prime is 100420427. The next prime is 100420459. The reversal of 100420447 is 744024001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100420447 - 2¹¹ = 100418399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100420427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50210223 + 50210224.

It is an arithmetic number, because the mean of its divisors is an integer number (50210224).

Almost surely, 2^100420447 is an apocalyptic number.

100420447 is a deficient number, since it is larger than the sum of its proper divisors (1).

100420447 is an equidigital number, since it uses as much as digits as its factorization.

100420447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 100420447 is about 10021.0002993713. Note that the first 3 decimals coincide. The cubic root of 100420447 is about 464.8084878294.

Adding to 100420447 its reverse (744024001), we get a palindrome (844444448).

The spelling of 100420447 in words is "one hundred million, four hundred twenty thousand, four hundred forty-seven".