79616381 has 8 divisors (see below), whose sum is σ = 86591064. Its totient is φ = 72763200.

The previous prime is 79616377. The next prime is 79616393. The reversal of 79616381 is 18361697.

It can be written as a sum of positive squares in 4 ways, for example, as 44023225 + 35593156 = 6635^2 + 5966^2 .

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 79616381 - 2² = 79616377 is a prime.

It is a super-3 number, since 3×79616381³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79616351) 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, 29006 + ... + 31631.

It is an arithmetic number, because the mean of its divisors is an integer number (10823883).

Almost surely, 2^79616381 is an apocalyptic number.

It is an amenable number.

79616381 is a deficient number, since it is larger than the sum of its proper divisors (6974683).

79616381 is a wasteful number, since it uses less digits than its factorization.

79616381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60751.

The product of its digits is 54432, while the sum is 41.

The square root of 79616381 is about 8922.8011857264. The cubic root of 79616381 is about 430.1970991137.

It can be divided in two parts, 79616 and 381, that added together give a palindrome (79997).

The spelling of 79616381 in words is "seventy-nine million, six hundred sixteen thousand, three hundred eighty-one".