320649597 has 20 divisors (see below), whose sum is σ = 507173436. Its totient is φ = 201191040.

The previous prime is 320649587. The next prime is 320649599. The reversal of 320649597 is 795946023.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 182493081 + 138156516 = 13509^2 + 11754^2 .

It is not a de Polignac number, because 320649597 - 2⁶ = 320649533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320649599) 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 19 ways as a sum of consecutive naturals, for example, 115054 + ... + 117807.

Almost surely, 2^320649597 is an apocalyptic number.

It is an amenable number.

320649597 is a deficient number, since it is larger than the sum of its proper divisors (186523839).

320649597 is a wasteful number, since it uses less digits than its factorization.

320649597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232890 (or 232881 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 320649597 is about 17906.6914029365. The cubic root of 320649597 is about 684.4528971944.

The spelling of 320649597 in words is "three hundred twenty million, six hundred forty-nine thousand, five hundred ninety-seven".