320673497 has 4 divisors (see below), whose sum is σ = 324276660. Its totient is φ = 317070336.

The previous prime is 320673481. The next prime is 320673511. The reversal of 320673497 is 794376023.

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 206525641 + 114147856 = 14371^2 + 10684^2 .

It is a cyclic number.

It is not a de Polignac number, because 320673497 - 2⁴ = 320673481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320673407) 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, 1801448 + ... + 1801625.

It is an arithmetic number, because the mean of its divisors is an integer number (81069165).

Almost surely, 2^320673497 is an apocalyptic number.

It is an amenable number.

320673497 is a deficient number, since it is larger than the sum of its proper divisors (3603163).

320673497 is an equidigital number, since it uses as much as digits as its factorization.

320673497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603162.

The product of its (nonzero) digits is 190512, while the sum is 41.

The square root of 320673497 is about 17907.3587387979. The cubic root of 320673497 is about 684.4699022761.

The spelling of 320673497 in words is "three hundred twenty million, six hundred seventy-three thousand, four hundred ninety-seven".