80819633 has 2 divisors, whose sum is σ = 80819634. Its totient is φ = 80819632.

The previous prime is 80819611. The next prime is 80819657. The reversal of 80819633 is 33691808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57942544 + 22877089 = 7612^2 + 4783^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80819633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (80819603) 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, 40409816 + 40409817.

It is an arithmetic number, because the mean of its divisors is an integer number (40409817).

Almost surely, 2^80819633 is an apocalyptic number.

It is an amenable number.

80819633 is a deficient number, since it is larger than the sum of its proper divisors (1).

80819633 is an equidigital number, since it uses as much as digits as its factorization.

80819633 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 38.

The square root of 80819633 is about 8989.9740266588. The cubic root of 80819633 is about 432.3534790523.

The spelling of 80819633 in words is "eighty million, eight hundred nineteen thousand, six hundred thirty-three".