79996997 has 8 divisors (see below), whose sum is σ = 82294776. Its totient is φ = 77706432.

The previous prime is 79996991. The next prime is 79996999. The reversal of 79996997 is 79969997.

It can be written as a sum of positive squares in 4 ways, for example, as 17048641 + 62948356 = 4129^2 + 7934^2 .

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 79996997 - 2⁶ = 79996933 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 (79996991) 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, 27203 + ... + 29999.

It is an arithmetic number, because the mean of its divisors is an integer number (10286847).

Almost surely, 2^79996997 is an apocalyptic number.

It is an amenable number.

79996997 is a deficient number, since it is larger than the sum of its proper divisors (2297779).

79996997 is a wasteful number, since it uses less digits than its factorization.

79996997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3607.

The product of its digits is 17360406, while the sum is 65.

The square root of 79996997 is about 8944.1040356203. The cubic root of 79996997 is about 430.8815464661.

Subtracting from 79996997 its reverse (79969997), we obtain a cube (27000 = 30³).

The spelling of 79996997 in words is "seventy-nine million, nine hundred ninety-six thousand, nine hundred ninety-seven".