78487679 has 2 divisors, whose sum is σ = 78487680. Its totient is φ = 78487678.

The previous prime is 78487667. The next prime is 78487699. The reversal of 78487679 is 97678487.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78487679 - 2¹⁶ = 78422143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78487609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39243839 + 39243840.

It is an arithmetic number, because the mean of its divisors is an integer number (39243840).

Almost surely, 2^78487679 is an apocalyptic number.

78487679 is a deficient number, since it is larger than the sum of its proper divisors (1).

78487679 is an equidigital number, since it uses as much as digits as its factorization.

78487679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632, while the sum is 56.

The square root of 78487679 is about 8859.3272317936. The cubic root of 78487679 is about 428.1544828401.

The spelling of 78487679 in words is "seventy-eight million, four hundred eighty-seven thousand, six hundred seventy-nine".