863537 has 2 divisors, whose sum is σ = 863538. Its totient is φ = 863536.

The previous prime is 863521. The next prime is 863539. The reversal of 863537 is 735368.

It is a happy number.

863537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583696 + 279841 = 764^2 + 529^2 .

It is a cyclic number.

It is not a de Polignac number, because 863537 - 2⁴ = 863521 is a prime.

Together with 863539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (863539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431768 + 431769.

It is an arithmetic number, because the mean of its divisors is an integer number (431769).

2⁸⁶³⁵³⁷ is an apocalyptic number.

It is an amenable number.

863537 is a deficient number, since it is larger than the sum of its proper divisors (1).

863537 is an equidigital number, since it uses as much as digits as its factorization.

863537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 32.

The square root of 863537 is about 929.2669153693. The cubic root of 863537 is about 95.2270469604.

The spelling of 863537 in words is "eight hundred sixty-three thousand, five hundred thirty-seven".