79978843 has 8 divisors (see below), whose sum is σ = 95378688. Its totient is φ = 65572584.

The previous prime is 79978841. The next prime is 79978849. The reversal of 79978843 is 34887997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79978843 - 2¹ = 79978841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79978841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248221 + ... + 248542.

It is an arithmetic number, because the mean of its divisors is an integer number (11922336).

Almost surely, 2^79978843 is an apocalyptic number.

79978843 is a deficient number, since it is larger than the sum of its proper divisors (15399845).

79978843 is a wasteful number, since it uses less digits than its factorization.

79978843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496793.

The product of its digits is 3048192, while the sum is 55.

The square root of 79978843 is about 8943.0891195381. The cubic root of 79978843 is about 430.8489501784.

The spelling of 79978843 in words is "seventy-nine million, nine hundred seventy-eight thousand, eight hundred forty-three".