81112963 has 2 divisors, whose sum is σ = 81112964. Its totient is φ = 81112962.

The previous prime is 81112939. The next prime is 81112979. The reversal of 81112963 is 36921118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81112963 - 2²⁵ = 47558531 is a prime.

It is not a weakly prime, because it can be changed into another prime (81112363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40556481 + 40556482.

It is an arithmetic number, because the mean of its divisors is an integer number (40556482).

Almost surely, 2^81112963 is an apocalyptic number.

81112963 is a deficient number, since it is larger than the sum of its proper divisors (1).

81112963 is an equidigital number, since it uses as much as digits as its factorization.

81112963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 81112963 is about 9006.2735357083. The cubic root of 81112963 is about 432.8759144998.

The spelling of 81112963 in words is "eighty-one million, one hundred twelve thousand, nine hundred sixty-three".