100072043 has 4 divisors (see below), whose sum is σ = 100101120. Its totient is φ = 100042968.

The previous prime is 100071997. The next prime is 100072073. The reversal of 100072043 is 340270001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340270001 = 193 ⋅1763057.

It is a cyclic number.

It is not a de Polignac number, because 100072043 - 2²⁰ = 99023467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100072073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8555 + ... + 16532.

It is an arithmetic number, because the mean of its divisors is an integer number (25025280).

Almost surely, 2^100072043 is an apocalyptic number.

100072043 is a deficient number, since it is larger than the sum of its proper divisors (29077).

100072043 is an equidigital number, since it uses as much as digits as its factorization.

100072043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29076.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 100072043 is about 10003.6015014594. The cubic root of 100072043 is about 464.2703212659.

The spelling of 100072043 in words is "one hundred million, seventy-two thousand, forty-three".