79672081 has 4 divisors (see below), whose sum is σ = 84358692. Its totient is φ = 74985472.

The previous prime is 79672067. The next prime is 79672157. The reversal of 79672081 is 18027697.

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 50339025 + 29333056 = 7095^2 + 5416^2 .

It is a cyclic number.

It is not a de Polignac number, because 79672081 - 2¹¹ = 79670033 is a prime.

It is a super-2 number, since 2×79672081² = 12695280981741122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79672051) 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, 2343280 + ... + 2343313.

It is an arithmetic number, because the mean of its divisors is an integer number (21089673).

Almost surely, 2^79672081 is an apocalyptic number.

It is an amenable number.

79672081 is a deficient number, since it is larger than the sum of its proper divisors (4686611).

79672081 is a wasteful number, since it uses less digits than its factorization.

79672081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686610.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 79672081 is about 8925.9218571529. The cubic root of 79672081 is about 430.2973983750.

The spelling of 79672081 in words is "seventy-nine million, six hundred seventy-two thousand, eighty-one".