523969 has 2 divisors, whose sum is σ = 523970. Its totient is φ = 523968.

The previous prime is 523949. The next prime is 523987. The reversal of 523969 is 969325.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 473344 + 50625 = 688^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 523969 - 2⁵ = 523937 is a prime.

It is a super-2 number, since 2×523969² = 549087025922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (523949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261984 + 261985.

It is an arithmetic number, because the mean of its divisors is an integer number (261985).

2⁵²³⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

523969 is a deficient number, since it is larger than the sum of its proper divisors (1).

523969 is an equidigital number, since it uses as much as digits as its factorization.

523969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 34.

The square root of 523969 is about 723.8570300826. The cubic root of 523969 is about 80.6185899196.

The spelling of 523969 in words is "five hundred twenty-three thousand, nine hundred sixty-nine".