81069463 has 2 divisors, whose sum is σ = 81069464. Its totient is φ = 81069462.

The previous prime is 81069451. The next prime is 81069467. The reversal of 81069463 is 36496018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81069463 - 2⁵ = 81069431 is a prime.

It is a super-2 number, since 2×81069463² = 13144515662216738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81069467) 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, 40534731 + 40534732.

It is an arithmetic number, because the mean of its divisors is an integer number (40534732).

Almost surely, 2^81069463 is an apocalyptic number.

81069463 is a deficient number, since it is larger than the sum of its proper divisors (1).

81069463 is an equidigital number, since it uses as much as digits as its factorization.

81069463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 81069463 is about 9003.8582285596. The cubic root of 81069463 is about 432.7985184473.

The spelling of 81069463 in words is "eighty-one million, sixty-nine thousand, four hundred sixty-three".