423651966 has 16 divisors (see below), whose sum is σ = 848930304. Its totient is φ = 140946264.

The previous prime is 423651929. The next prime is 423652007. The reversal of 423651966 is 669156324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64366 + ... + 70641.

It is an arithmetic number, because the mean of its divisors is an integer number (53058144).

Almost surely, 2^423651966 is an apocalyptic number.

423651966 is an abundant number, since it is smaller than the sum of its proper divisors (425278338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423651966 is a wasteful number, since it uses less digits than its factorization.

423651966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135535.

The product of its digits is 233280, while the sum is 42.

The square root of 423651966 is about 20582.8075344449. The cubic root of 423651966 is about 751.0515418794.

The spelling of 423651966 in words is "four hundred twenty-three million, six hundred fifty-one thousand, nine hundred sixty-six".