431466509 has 4 divisors (see below), whose sum is σ = 443127804. Its totient is φ = 419805216.

The previous prime is 431466473. The next prime is 431466527. The reversal of 431466509 is 905664134.

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

It can be written as a sum of positive squares in 2 ways, for example, as 175562500 + 255904009 = 13250^2 + 15997^2 .

It is a cyclic number.

It is not a de Polignac number, because 431466509 - 2⁸ = 431466253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431466559) 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, 5830592 + ... + 5830665.

It is an arithmetic number, because the mean of its divisors is an integer number (110781951).

Almost surely, 2^431466509 is an apocalyptic number.

It is an amenable number.

431466509 is a deficient number, since it is larger than the sum of its proper divisors (11661295).

431466509 is a wasteful number, since it uses less digits than its factorization.

431466509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11661294.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 431466509 is about 20771.7719273056. The cubic root of 431466509 is about 755.6413181683.

The spelling of 431466509 in words is "four hundred thirty-one million, four hundred sixty-six thousand, five hundred nine".