431906 has 4 divisors (see below), whose sum is σ = 647862. Its totient is φ = 215952.

The previous prime is 431903. The next prime is 431911. The reversal of 431906 is 609134.

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., 410881 + 21025 = 641^2 + 145^2 .

It is not an unprimeable number, because it can be changed into a prime (431903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107975 + ... + 107978.

2⁴³¹⁹⁰⁶ is an apocalyptic number.

431906 is a deficient number, since it is larger than the sum of its proper divisors (215956).

431906 is a wasteful number, since it uses less digits than its factorization.

431906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215955.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 431906 is about 657.1955568931. The cubic root of 431906 is about 75.5897796062.

The spelling of 431906 in words is "four hundred thirty-one thousand, nine hundred six".