79689893 has 4 divisors (see below), whose sum is σ = 80102988. Its totient is φ = 79276800.

The previous prime is 79689889. The next prime is 79689901. The reversal of 79689893 is 39898697.

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 42211009 + 37478884 = 6497^2 + 6122^2 .

It is a cyclic number.

It is not a de Polignac number, because 79689893 - 2² = 79689889 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 (79649893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206258 + ... + 206643.

It is an arithmetic number, because the mean of its divisors is an integer number (20025747).

Almost surely, 2^79689893 is an apocalyptic number.

It is an amenable number.

79689893 is a deficient number, since it is larger than the sum of its proper divisors (413095).

79689893 is a wasteful number, since it uses less digits than its factorization.

79689893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413094.

The product of its digits is 5878656, while the sum is 59.

The square root of 79689893 is about 8926.9195694820. The cubic root of 79689893 is about 430.3294626651.

The spelling of 79689893 in words is "seventy-nine million, six hundred eighty-nine thousand, eight hundred ninety-three".