81086963 has 2 divisors, whose sum is σ = 81086964. Its totient is φ = 81086962.

The previous prime is 81086959. The next prime is 81086969. The reversal of 81086963 is 36968018.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81086963 - 2² = 81086959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81086963.

It is not a weakly prime, because it can be changed into another prime (81086969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40543481 + 40543482.

It is an arithmetic number, because the mean of its divisors is an integer number (40543482).

Almost surely, 2^81086963 is an apocalyptic number.

81086963 is a deficient number, since it is larger than the sum of its proper divisors (1).

81086963 is an equidigital number, since it uses as much as digits as its factorization.

81086963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 81086963 is about 9004.8299817376. The cubic root of 81086963 is about 432.8296581181.

The spelling of 81086963 in words is "eighty-one million, eighty-six thousand, nine hundred sixty-three".