85780433 has 2 divisors, whose sum is σ = 85780434. Its totient is φ = 85780432.

The previous prime is 85780427. The next prime is 85780451. The reversal of 85780433 is 33408758.

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., 78978769 + 6801664 = 8887^2 + 2608^2 .

It is a cyclic number.

It is not a de Polignac number, because 85780433 - 2¹⁰ = 85779409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_4986452 and since 85780433 and 4986452 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (85080433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42890216 + 42890217.

It is an arithmetic number, because the mean of its divisors is an integer number (42890217).

Almost surely, 2^85780433 is an apocalyptic number.

It is an amenable number.

85780433 is a deficient number, since it is larger than the sum of its proper divisors (1).

85780433 is an equidigital number, since it uses as much as digits as its factorization.

85780433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 85780433 is about 9261.7726704989. The cubic root of 85780433 is about 441.0245288811.

The spelling of 85780433 in words is "eighty-five million, seven hundred eighty thousand, four hundred thirty-three".