78968413 has 4 divisors (see below), whose sum is σ = 80648640. Its totient is φ = 77288188.

The previous prime is 78968399. The next prime is 78968423. The reversal of 78968413 is 31486987.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31486987 = 7 ⋅4498141.

It is a cyclic number.

It is not a de Polignac number, because 78968413 - 2⁵ = 78968381 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 (78968423) 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, 840043 + ... + 840136.

It is an arithmetic number, because the mean of its divisors is an integer number (20162160).

Almost surely, 2^78968413 is an apocalyptic number.

It is an amenable number.

78968413 is a deficient number, since it is larger than the sum of its proper divisors (1680227).

78968413 is a wasteful number, since it uses less digits than its factorization.

78968413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680226.

The product of its digits is 290304, while the sum is 46.

The square root of 78968413 is about 8886.4173320861. The cubic root of 78968413 is about 429.0268474096.

The spelling of 78968413 in words is "seventy-eight million, nine hundred sixty-eight thousand, four hundred thirteen".