80775533 has 2 divisors, whose sum is σ = 80775534. Its totient is φ = 80775532.

The previous prime is 80775523. The next prime is 80775559. The reversal of 80775533 is 33557708.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73496329 + 7279204 = 8573^2 + 2698^2 .

It is a cyclic number.

It is not a de Polignac number, because 80775533 - 2¹⁴ = 80759149 is a prime.

It is a super-3 number, since 3×80775533³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80775523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40387766 + 40387767.

It is an arithmetic number, because the mean of its divisors is an integer number (40387767).

Almost surely, 2^80775533 is an apocalyptic number.

It is an amenable number.

80775533 is a deficient number, since it is larger than the sum of its proper divisors (1).

80775533 is an equidigital number, since it uses as much as digits as its factorization.

80775533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 80775533 is about 8987.5209596418. The cubic root of 80775533 is about 432.2748254844.

The spelling of 80775533 in words is "eighty million, seven hundred seventy-five thousand, five hundred thirty-three".