78493413 has 4 divisors (see below), whose sum is σ = 104657888. Its totient is φ = 52328940.

The previous prime is 78493379. The next prime is 78493417. The reversal of 78493413 is 31439487.

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 78493413 - 2¹⁰ = 78492389 is a prime.

It is a super-2 number, since 2×78493413² = 12322431768777138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78493417) 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, 13082233 + ... + 13082238.

It is an arithmetic number, because the mean of its divisors is an integer number (26164472).

Almost surely, 2^78493413 is an apocalyptic number.

It is an amenable number.

78493413 is a deficient number, since it is larger than the sum of its proper divisors (26164475).

78493413 is a wasteful number, since it uses less digits than its factorization.

78493413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26164474.

The product of its digits is 72576, while the sum is 39.

The square root of 78493413 is about 8859.6508396212. The cubic root of 78493413 is about 428.1649090116.

The spelling of 78493413 in words is "seventy-eight million, four hundred ninety-three thousand, four hundred thirteen".