4423193906 has 4 divisors (see below), whose sum is σ = 6634790862. Its totient is φ = 2211596952.

The previous prime is 4423193891. The next prime is 4423193981. The reversal of 4423193906 is 6093913244.

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

It can be written as a sum of positive squares in only one way, i.e., 3923894881 + 499299025 = 62641^2 + 22345^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105798475 + ... + 1105798478.

Almost surely, 2^4423193906 is an apocalyptic number.

4423193906 is a deficient number, since it is larger than the sum of its proper divisors (2211596956).

4423193906 is a wasteful number, since it uses less digits than its factorization.

4423193906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211596955.

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 4423193906 is about 66507.0966589281. The cubic root of 4423193906 is about 1641.5167786378.

The spelling of 4423193906 in words is "four billion, four hundred twenty-three million, one hundred ninety-three thousand, nine hundred six".