72100443 has 4 divisors (see below), whose sum is σ = 96133928. Its totient is φ = 48066960.

The previous prime is 72100411. The next prime is 72100481. The reversal of 72100443 is 34400127.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 72100443 - 2⁵ = 72100411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72100493) 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, 12016738 + ... + 12016743.

It is an arithmetic number, because the mean of its divisors is an integer number (24033482).

Almost surely, 2^72100443 is an apocalyptic number.

72100443 is a deficient number, since it is larger than the sum of its proper divisors (24033485).

72100443 is a wasteful number, since it uses less digits than its factorization.

72100443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24033484.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 72100443 is about 8491.1979720178. The cubic root of 72100443 is about 416.2101282950.

The spelling of 72100443 in words is "seventy-two million, one hundred thousand, four hundred forty-three".