78580487 has 2 divisors, whose sum is σ = 78580488. Its totient is φ = 78580486.

The previous prime is 78580483. The next prime is 78580501. The reversal of 78580487 is 78408587.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78580487 - 2² = 78580483 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78580483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39290243 + 39290244.

It is an arithmetic number, because the mean of its divisors is an integer number (39290244).

Almost surely, 2^78580487 is an apocalyptic number.

78580487 is a deficient number, since it is larger than the sum of its proper divisors (1).

78580487 is an equidigital number, since it uses as much as digits as its factorization.

78580487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 501760, while the sum is 47.

The square root of 78580487 is about 8864.5635538361. The cubic root of 78580487 is about 428.3231739008.

The spelling of 78580487 in words is "seventy-eight million, five hundred eighty thousand, four hundred eighty-seven".