100442047 has 4 divisors (see below), whose sum is σ = 100605456. Its totient is φ = 100278640.

The previous prime is 100442039. The next prime is 100442053. The reversal of 100442047 is 740244001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740244001 = 7 ⋅105749143.

It is a cyclic number.

It is not a de Polignac number, because 100442047 - 2³ = 100442039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100442347) 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, 80779 + ... + 82012.

It is an arithmetic number, because the mean of its divisors is an integer number (25151364).

Almost surely, 2^100442047 is an apocalyptic number.

100442047 is a deficient number, since it is larger than the sum of its proper divisors (163409).

100442047 is an equidigital number, since it uses as much as digits as its factorization.

100442047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163408.

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

The square root of 100442047 is about 10022.0779781441. The cubic root of 100442047 is about 464.8418115328.

Adding to 100442047 its reverse (740244001), we get a palindrome (840686048).

The spelling of 100442047 in words is "one hundred million, four hundred forty-two thousand, forty-seven".