78696349 has 4 divisors (see below), whose sum is σ = 83325564. Its totient is φ = 74067136.

The previous prime is 78696337. The next prime is 78696353. The reversal of 78696349 is 94369687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94369687 = 79 ⋅1194553.

It can be written as a sum of positive squares in 2 ways, for example, as 34047225 + 44649124 = 5835^2 + 6682^2 .

It is a cyclic number.

It is not a de Polignac number, because 78696349 - 2⁷ = 78696221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78696296 and 78696305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78696389) 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, 2314582 + ... + 2314615.

It is an arithmetic number, because the mean of its divisors is an integer number (20831391).

Almost surely, 2^78696349 is an apocalyptic number.

It is an amenable number.

78696349 is a deficient number, since it is larger than the sum of its proper divisors (4629215).

78696349 is a wasteful number, since it uses less digits than its factorization.

78696349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629214.

The product of its digits is 1959552, while the sum is 52.

The square root of 78696349 is about 8871.0962682185. The cubic root of 78696349 is about 428.5335824093.

The spelling of 78696349 in words is "seventy-eight million, six hundred ninety-six thousand, three hundred forty-nine".