78489067 has 4 divisors (see below), whose sum is σ = 78510600. Its totient is φ = 78467536.

The previous prime is 78489049. The next prime is 78489071. The reversal of 78489067 is 76098487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76098487 = 1979 ⋅38453.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78489067 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78489067.

It is not an unprimeable number, because it can be changed into a prime (78489007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3793 + ... + 13090.

It is an arithmetic number, because the mean of its divisors is an integer number (19627650).

Almost surely, 2^78489067 is an apocalyptic number.

78489067 is a deficient number, since it is larger than the sum of its proper divisors (21533).

78489067 is a wasteful number, since it uses less digits than its factorization.

78489067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21532.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 78489067 is about 8859.4055669667. The cubic root of 78489067 is about 428.1570066966.

The spelling of 78489067 in words is "seventy-eight million, four hundred eighty-nine thousand, sixty-seven".