78968797 has 4 divisors (see below), whose sum is σ = 79106236. Its totient is φ = 78831360.

The previous prime is 78968783. The next prime is 78968803. The reversal of 78968797 is 79786987.

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 54257956 + 24710841 = 7366^2 + 4971^2 .

It is a cyclic number.

It is not a de Polignac number, because 78968797 - 2²³ = 70580189 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 (78968717) 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, 67854 + ... + 69007.

It is an arithmetic number, because the mean of its divisors is an integer number (19776559).

Almost surely, 2^78968797 is an apocalyptic number.

It is an amenable number.

78968797 is a deficient number, since it is larger than the sum of its proper divisors (137439).

78968797 is a wasteful number, since it uses less digits than its factorization.

78968797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137438.

The product of its digits is 10668672, while the sum is 61.

The square root of 78968797 is about 8886.4389380674. The cubic root of 78968797 is about 429.0275428186.

The spelling of 78968797 in words is "seventy-eight million, nine hundred sixty-eight thousand, seven hundred ninety-seven".