78891463 has 4 divisors (see below), whose sum is σ = 90161680. Its totient is φ = 67621248.

The previous prime is 78891451. The next prime is 78891481. The reversal of 78891463 is 36419887.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78891463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78891413) 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, 5635098 + ... + 5635111.

It is an arithmetic number, because the mean of its divisors is an integer number (22540420).

Almost surely, 2^78891463 is an apocalyptic number.

78891463 is a deficient number, since it is larger than the sum of its proper divisors (11270217).

78891463 is a wasteful number, since it uses less digits than its factorization.

78891463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11270216.

The product of its digits is 290304, while the sum is 46.

The square root of 78891463 is about 8882.0866354703. The cubic root of 78891463 is about 428.8874484452.

The spelling of 78891463 in words is "seventy-eight million, eight hundred ninety-one thousand, four hundred sixty-three".