80525009 has 2 divisors, whose sum is σ = 80525010. Its totient is φ = 80525008.

The previous prime is 80524999. The next prime is 80525051. The reversal of 80525009 is 90052508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70896400 + 9628609 = 8420^2 + 3103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80525009 is a prime.

It is not a weakly prime, because it can be changed into another prime (80525609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40262504 + 40262505.

It is an arithmetic number, because the mean of its divisors is an integer number (40262505).

Almost surely, 2^80525009 is an apocalyptic number.

It is an amenable number.

80525009 is a deficient number, since it is larger than the sum of its proper divisors (1).

80525009 is an equidigital number, since it uses as much as digits as its factorization.

80525009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 80525009 is about 8973.5728113166. The cubic root of 80525009 is about 431.8274648944.

The spelling of 80525009 in words is "eighty million, five hundred twenty-five thousand, nine".