431966 has 4 divisors (see below), whose sum is σ = 647952. Its totient is φ = 215982.

The previous prime is 431947. The next prime is 431983. The reversal of 431966 is 669134.

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

It is a congruent number.

It is an unprimeable number.

431966 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107990 + ... + 107993.

It is an arithmetic number, because the mean of its divisors is an integer number (161988).

2⁴³¹⁹⁶⁶ is an apocalyptic number.

431966 is a deficient number, since it is larger than the sum of its proper divisors (215986).

431966 is a wasteful number, since it uses less digits than its factorization.

431966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215985.

The product of its digits is 3888, while the sum is 29.

The square root of 431966 is about 657.2412038209. The cubic root of 431966 is about 75.5932797326.

The spelling of 431966 in words is "four hundred thirty-one thousand, nine hundred sixty-six".