80919533 has 2 divisors, whose sum is σ = 80919534. Its totient is φ = 80919532.

The previous prime is 80919493. The next prime is 80919583. The reversal of 80919533 is 33591908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71690089 + 9229444 = 8467^2 + 3038^2 .

It is a cyclic number.

It is not a de Polignac number, because 80919533 - 2²⁰ = 79870957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80919583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40459766 + 40459767.

It is an arithmetic number, because the mean of its divisors is an integer number (40459767).

Almost surely, 2^80919533 is an apocalyptic number.

It is an amenable number.

80919533 is a deficient number, since it is larger than the sum of its proper divisors (1).

80919533 is an equidigital number, since it uses as much as digits as its factorization.

80919533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 80919533 is about 8995.5285003161. The cubic root of 80919533 is about 432.5315477004.

The spelling of 80919533 in words is "eighty million, nine hundred nineteen thousand, five hundred thirty-three".