915997963 has 2 divisors, whose sum is σ = 915997964. Its totient is φ = 915997962.

The previous prime is 915997949. The next prime is 915997967. The reversal of 915997963 is 369799519.

It is a strong prime.

It is an emirp because it is prime and its reverse (369799519) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-915997963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 915997898 and 915997907.

It is not a weakly prime, because it can be changed into another prime (915997967) 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, 457998981 + 457998982.

It is an arithmetic number, because the mean of its divisors is an integer number (457998982).

Almost surely, 2^915997963 is an apocalyptic number.

915997963 is a deficient number, since it is larger than the sum of its proper divisors (1).

915997963 is an equidigital number, since it uses as much as digits as its factorization.

915997963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4133430, while the sum is 58.

The square root of 915997963 is about 30265.4582486372. The cubic root of 915997963 is about 971.1765095204.

The spelling of 915997963 in words is "nine hundred fifteen million, nine hundred ninety-seven thousand, nine hundred sixty-three".