431320653 has 32 divisors (see below), whose sum is σ = 674841600. Its totient is φ = 271515888.

The previous prime is 431320649. The next prime is 431320693. The reversal of 431320653 is 356023134.

It is a happy number.

431320653 is a `hidden beast` number, since 4 + 3 + 1 + 3 + 2 + 0 + 653 = 666.

It is not a de Polignac number, because 431320653 - 2² = 431320649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431320693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176800 + ... + 179222.

It is an arithmetic number, because the mean of its divisors is an integer number (21088800).

Almost surely, 2^431320653 is an apocalyptic number.

It is an amenable number.

431320653 is a deficient number, since it is larger than the sum of its proper divisors (243520947).

431320653 is a wasteful number, since it uses less digits than its factorization.

431320653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798 (or 2792 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 431320653 is about 20768.2607119614. The cubic root of 431320653 is about 755.5561611210.

Adding to 431320653 its reverse (356023134), we get a palindrome (787343787).

The spelling of 431320653 in words is "four hundred thirty-one million, three hundred twenty thousand, six hundred fifty-three".