797531 has 4 divisors (see below), whose sum is σ = 911472. Its totient is φ = 683592.

The previous prime is 797509. The next prime is 797539. The reversal of 797531 is 135797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135797 = 229 ⋅593.

It is not a de Polignac number, because 797531 - 2¹⁸ = 535387 is a prime.

It is a super-2 number, since 2×797531² = 1272111391922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (797539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56960 + ... + 56973.

It is an arithmetic number, because the mean of its divisors is an integer number (227868).

2⁷⁹⁷⁵³¹ is an apocalyptic number.

797531 is a deficient number, since it is larger than the sum of its proper divisors (113941).

797531 is a wasteful number, since it uses less digits than its factorization.

797531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113940.

The product of its digits is 6615, while the sum is 32.

The square root of 797531 is about 893.0459114738. The cubic root of 797531 is about 92.7361775669.

The spelling of 797531 in words is "seven hundred ninety-seven thousand, five hundred thirty-one".