79447993 has 8 divisors (see below), whose sum is σ = 80167136. Its totient is φ = 78732000.

The previous prime is 79447969. The next prime is 79447999. The reversal of 79447993 is 39974497.

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

It is a cyclic number.

It is not a de Polignac number, because 79447993 - 2⁹ = 79447481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79447993.

It is not an unprimeable number, because it can be changed into a prime (79447999) 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, 97558 + ... + 98368.

It is an arithmetic number, because the mean of its divisors is an integer number (10020892).

Almost surely, 2^79447993 is an apocalyptic number.

It is an amenable number.

79447993 is a deficient number, since it is larger than the sum of its proper divisors (719143).

79447993 is a wasteful number, since it uses less digits than its factorization.

79447993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575.

The product of its digits is 1714608, while the sum is 52.

The square root of 79447993 is about 8913.3603652046. The cubic root of 79447993 is about 429.8935972533.

The spelling of 79447993 in words is "seventy-nine million, four hundred forty-seven thousand, nine hundred ninety-three".