263497 has 4 divisors (see below), whose sum is σ = 283780. Its totient is φ = 243216.

The previous prime is 263491. The next prime is 263503. The reversal of 263497 is 794362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794362 = 2 ⋅397181.

It is an interprime number because it is at equal distance from previous prime (263491) and next prime (263503).

It can be written as a sum of positive squares in 2 ways, for example, as 118336 + 145161 = 344^2 + 381^2 .

It is a cyclic number.

It is not a de Polignac number, because 263497 - 2³ = 263489 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁵ + 6⁴ + 4⁹ + 3² + 9 + 7 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263491) 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, 10122 + ... + 10147.

It is an arithmetic number, because the mean of its divisors is an integer number (70945).

2²⁶³⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

263497 is a deficient number, since it is larger than the sum of its proper divisors (20283).

263497 is a wasteful number, since it uses less digits than its factorization.

263497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20282.

The product of its digits is 9072, while the sum is 31.

The square root of 263497 is about 513.3195885606. The cubic root of 263497 is about 64.1099185312.

The spelling of 263497 in words is "two hundred sixty-three thousand, four hundred ninety-seven".