819395963 has 2 divisors, whose sum is σ = 819395964. Its totient is φ = 819395962.

The previous prime is 819395939. The next prime is 819396001. The reversal of 819395963 is 369593918.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 819395963 - 2¹⁶ = 819330427 is a prime.

It is a super-4 number, since 4×819395963⁴ (a number of 37 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (819395063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409697981 + 409697982.

It is an arithmetic number, because the mean of its divisors is an integer number (409697982).

Almost surely, 2^819395963 is an apocalyptic number.

819395963 is a deficient number, since it is larger than the sum of its proper divisors (1).

819395963 is an equidigital number, since it uses as much as digits as its factorization.

819395963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 53.

The square root of 819395963 is about 28625.0932400228. The cubic root of 819395963 is about 935.7602795620.

The spelling of 819395963 in words is "eight hundred nineteen million, three hundred ninety-five thousand, nine hundred sixty-three".