80087509 has 2 divisors, whose sum is σ = 80087510. Its totient is φ = 80087508.

The previous prime is 80087479. The next prime is 80087519. The reversal of 80087509 is 90578008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66471409 + 13616100 = 8153^2 + 3690^2 .

It is a cyclic number.

It is not a de Polignac number, because 80087509 - 2¹⁹ = 79563221 is a prime.

It is equal to p_4674178 and since 80087509 and 4674178 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80087519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40043754 + 40043755.

It is an arithmetic number, because the mean of its divisors is an integer number (40043755).

Almost surely, 2^80087509 is an apocalyptic number.

It is an amenable number.

80087509 is a deficient number, since it is larger than the sum of its proper divisors (1).

80087509 is an equidigital number, since it uses as much as digits as its factorization.

80087509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 80087509 is about 8949.1624747794. The cubic root of 80087509 is about 431.0439911099.

The spelling of 80087509 in words is "eighty million, eighty-seven thousand, five hundred nine".