423666211 has 4 divisors (see below), whose sum is σ = 423864424. Its totient is φ = 423468000.

The previous prime is 423666209. The next prime is 423666223. The reversal of 423666211 is 112666324.

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

It is a cyclic number.

It is not a de Polignac number, because 423666211 - 2¹ = 423666209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423666251) 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, 95865 + ... + 100186.

It is an arithmetic number, because the mean of its divisors is an integer number (105966106).

Almost surely, 2^423666211 is an apocalyptic number.

423666211 is a deficient number, since it is larger than the sum of its proper divisors (198213).

423666211 is a wasteful number, since it uses less digits than its factorization.

423666211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198212.

The product of its digits is 10368, while the sum is 31.

The square root of 423666211 is about 20583.1535727643. The cubic root of 423666211 is about 751.0599596454.

The spelling of 423666211 in words is "four hundred twenty-three million, six hundred sixty-six thousand, two hundred eleven".