78484013 has 4 divisors (see below), whose sum is σ = 78503040. Its totient is φ = 78464988.

The previous prime is 78484009. The next prime is 78484061. The reversal of 78484013 is 31048487.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 78484013 - 2² = 78484009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78484093) 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, 443 + ... + 12536.

It is an arithmetic number, because the mean of its divisors is an integer number (19625760).

Almost surely, 2^78484013 is an apocalyptic number.

It is an amenable number.

78484013 is a deficient number, since it is larger than the sum of its proper divisors (19027).

78484013 is a wasteful number, since it uses less digits than its factorization.

78484013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19026.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 78484013 is about 8859.1203287911. The cubic root of 78484013 is about 428.1478166610.

The spelling of 78484013 in words is "seventy-eight million, four hundred eighty-four thousand, thirteen".