320273497 has 4 divisors (see below), whose sum is σ = 320796580. Its totient is φ = 319750416.

The previous prime is 320273479. The next prime is 320273507. The reversal of 320273497 is 794372023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794372023 = 23609 ⋅33647.

It can be written as a sum of positive squares in 2 ways, for example, as 8433216 + 311840281 = 2904^2 + 17659^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320273497 is a prime.

It is a super-2 number, since 2×320273497² = 205150225761218018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320273197) 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, 260622 + ... + 261847.

It is an arithmetic number, because the mean of its divisors is an integer number (80199145).

Almost surely, 2^320273497 is an apocalyptic number.

It is an amenable number.

320273497 is a deficient number, since it is larger than the sum of its proper divisors (523083).

320273497 is an equidigital number, since it uses as much as digits as its factorization.

320273497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523082.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 320273497 is about 17896.1866608504. The cubic root of 320273497 is about 684.1851870532.

The spelling of 320273497 in words is "three hundred twenty million, two hundred seventy-three thousand, four hundred ninety-seven".