78469613 has 4 divisors (see below), whose sum is σ = 80383548. Its totient is φ = 76555680.

The previous prime is 78469591. The next prime is 78469619. The reversal of 78469613 is 31696487.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44328964 + 34140649 = 6658^2 + 5843^2 .

It is a cyclic number.

It is not a de Polignac number, because 78469613 - 2¹⁶ = 78404077 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 (78469619) 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, 956906 + ... + 956987.

It is an arithmetic number, because the mean of its divisors is an integer number (20095887).

Almost surely, 2^78469613 is an apocalyptic number.

It is an amenable number.

78469613 is a deficient number, since it is larger than the sum of its proper divisors (1913935).

78469613 is a wasteful number, since it uses less digits than its factorization.

78469613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913934.

The product of its digits is 217728, while the sum is 44.

The square root of 78469613 is about 8858.3075697336. The cubic root of 78469613 is about 428.1216299875.

The spelling of 78469613 in words is "seventy-eight million, four hundred sixty-nine thousand, six hundred thirteen".