100420673 has 4 divisors (see below), whose sum is σ = 100489428. Its totient is φ = 100351920.

The previous prime is 100420669. The next prime is 100420679. The reversal of 100420673 is 376024001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376024001 = 107 ⋅3514243.

It can be written as a sum of positive squares in 2 ways, for example, as 81306289 + 19114384 = 9017^2 + 4372^2 .

It is a cyclic number.

It is not a de Polignac number, because 100420673 - 2² = 100420669 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100420679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32138 + ... + 35123.

It is an arithmetic number, because the mean of its divisors is an integer number (25122357).

Almost surely, 2^100420673 is an apocalyptic number.

It is an amenable number.

100420673 is a deficient number, since it is larger than the sum of its proper divisors (68755).

100420673 is an equidigital number, since it uses as much as digits as its factorization.

100420673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68754.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 100420673 is about 10021.0115756844. The cubic root of 100420673 is about 464.8088365188.

Adding to 100420673 its reverse (376024001), we get a palindrome (476444674).

The spelling of 100420673 in words is "one hundred million, four hundred twenty thousand, six hundred seventy-three".