78463609 has 8 divisors (see below), whose sum is σ = 89827200. Its totient is φ = 67138656.

The previous prime is 78463601. The next prime is 78463613. The reversal of 78463609 is 90636487.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78463609 - 2³ = 78463601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78463601) 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 in 7 ways as a sum of consecutive naturals, for example, 5164 + ... + 13549.

It is an arithmetic number, because the mean of its divisors is an integer number (11228400).

Almost surely, 2^78463609 is an apocalyptic number.

It is an amenable number.

78463609 is a deficient number, since it is larger than the sum of its proper divisors (11363591).

78463609 is a wasteful number, since it uses less digits than its factorization.

78463609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19319.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 78463609 is about 8857.9686723311. The cubic root of 78463609 is about 428.1107106531.

The spelling of 78463609 in words is "seventy-eight million, four hundred sixty-three thousand, six hundred nine".