306497 has 4 divisors (see below), whose sum is σ = 316416. Its totient is φ = 296580.

The previous prime is 306491. The next prime is 306503. The reversal of 306497 is 794603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 794603 = 353 ⋅2251.

It is an interprime number because it is at equal distance from previous prime (306491) and next prime (306503).

It is a cyclic number.

It is not a de Polignac number, because 306497 - 2¹⁴ = 290113 is a prime.

It is a super-2 number, since 2×306497² = 187880822018, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 306497.

It is not an unprimeable number, because it can be changed into a prime (306491) 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, 4913 + ... + 4974.

It is an arithmetic number, because the mean of its divisors is an integer number (79104).

2³⁰⁶⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

306497 is a deficient number, since it is larger than the sum of its proper divisors (9919).

306497 is an equidigital number, since it uses as much as digits as its factorization.

306497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9918.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 306497 is about 553.6217120020. The cubic root of 306497 is about 67.4231040200.

The spelling of 306497 in words is "three hundred six thousand, four hundred ninety-seven".