815963 has 2 divisors, whose sum is σ = 815964. Its totient is φ = 815962.

The previous prime is 815953. The next prime is 815977. The reversal of 815963 is 369518.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 815963 - 2¹⁰ = 814939 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 815963.

It is not a weakly prime, because it can be changed into another prime (815923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407981 + 407982.

It is an arithmetic number, because the mean of its divisors is an integer number (407982).

2⁸¹⁵⁹⁶³ is an apocalyptic number.

815963 is a deficient number, since it is larger than the sum of its proper divisors (1).

815963 is an equidigital number, since it uses as much as digits as its factorization.

815963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 815963 is about 903.3067031745. The cubic root of 815963 is about 93.4451621588.

The spelling of 815963 in words is "eight hundred fifteen thousand, nine hundred sixty-three".