79967381 has 8 divisors (see below), whose sum is σ = 87405024. Its totient is φ = 72713520.

The previous prime is 79967359. The next prime is 79967387. The reversal of 79967381 is 18376997.

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 79967381 - 2¹⁰ = 79966357 is a prime.

It is a super-2 number, since 2×79967381² = 12789564047998322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79967387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45035 + ... + 46776.

It is an arithmetic number, because the mean of its divisors is an integer number (10925628).

Almost surely, 2^79967381 is an apocalyptic number.

It is an amenable number.

79967381 is a deficient number, since it is larger than the sum of its proper divisors (7437643).

79967381 is a wasteful number, since it uses less digits than its factorization.

79967381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91891.

The product of its digits is 571536, while the sum is 50.

The square root of 79967381 is about 8942.4482665543. The cubic root of 79967381 is about 430.8283671242.

The spelling of 79967381 in words is "seventy-nine million, nine hundred sixty-seven thousand, three hundred eighty-one".