80601509 has 2 divisors, whose sum is σ = 80601510. Its totient is φ = 80601508.

The previous prime is 80601497. The next prime is 80601529. The reversal of 80601509 is 90510608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43428100 + 37173409 = 6590^2 + 6097^2 .

It is a cyclic number.

It is not a de Polignac number, because 80601509 - 2⁸ = 80601253 is a prime.

It is a Sophie Germain prime.

It is a Chen 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 (80601529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40300754 + 40300755.

It is an arithmetic number, because the mean of its divisors is an integer number (40300755).

Almost surely, 2^80601509 is an apocalyptic number.

It is an amenable number.

80601509 is a deficient number, since it is larger than the sum of its proper divisors (1).

80601509 is an equidigital number, since it uses as much as digits as its factorization.

80601509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 80601509 is about 8977.8343156911. The cubic root of 80601509 is about 431.9641691961.

Subtracting 80601509 from its reverse (90510608), we obtain a palindrome (9909099).

The spelling of 80601509 in words is "eighty million, six hundred one thousand, five hundred nine".