78463893 has 4 divisors (see below), whose sum is σ = 104618528. Its totient is φ = 52309260.

The previous prime is 78463871. The next prime is 78463897. The reversal of 78463893 is 39836487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78463893 - 2⁶ = 78463829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78463897) 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 3 ways as a sum of consecutive naturals, for example, 13077313 + ... + 13077318.

It is an arithmetic number, because the mean of its divisors is an integer number (26154632).

Almost surely, 2^78463893 is an apocalyptic number.

It is an amenable number.

78463893 is a deficient number, since it is larger than the sum of its proper divisors (26154635).

78463893 is a wasteful number, since it uses less digits than its factorization.

78463893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26154634.

The product of its digits is 870912, while the sum is 48.

The square root of 78463893 is about 8857.9847030800. The cubic root of 78463893 is about 428.1112271698. Note that the first 3 decimals are identical.

The spelling of 78463893 in words is "seventy-eight million, four hundred sixty-three thousand, eight hundred ninety-three".