531997 has 2 divisors, whose sum is σ = 531998. Its totient is φ = 531996.

The previous prime is 531989. The next prime is 532001. The reversal of 531997 is 799135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 509796 + 22201 = 714^2 + 149^2 .

It is a cyclic number.

It is not a de Polignac number, because 531997 - 2³ = 531989 is a prime.

It is a pancake number, because a pancake can be divided into 531997 parts by 1031 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265998 + 265999.

It is an arithmetic number, because the mean of its divisors is an integer number (265999).

2⁵³¹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

531997 is a deficient number, since it is larger than the sum of its proper divisors (1).

531997 is an equidigital number, since it uses as much as digits as its factorization.

531997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8505, while the sum is 34.

The square root of 531997 is about 729.3812446177. The cubic root of 531997 is about 81.0282378811.

The spelling of 531997 in words is "five hundred thirty-one thousand, nine hundred ninety-seven".