639848223 has 18 divisors (see below), whose sum is σ = 1075119864. Its totient is φ = 365627304.

The previous prime is 639848113. The next prime is 639848233. The reversal of 639848223 is 322848936.

639848223 is a `hidden beast` number, since 63 + 98 + 482 + 23 = 666.

It is not a de Polignac number, because 639848223 - 2⁹ = 639847711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639848233) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 725011 + ... + 725892.

Almost surely, 2^639848223 is an apocalyptic number.

639848223 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

639848223 is a deficient number, since it is larger than the sum of its proper divisors (435271641).

639848223 is a wasteful number, since it uses less digits than its factorization.

639848223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450923 (or 1450913 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 639848223 is about 25295.2213471240. The cubic root of 639848223 is about 861.7057469531.

The spelling of 639848223 in words is "six hundred thirty-nine million, eight hundred forty-eight thousand, two hundred twenty-three".