79347281 has 4 divisors (see below), whose sum is σ = 85450932. Its totient is φ = 73243632.

The previous prime is 79347269. The next prime is 79347311. The reversal of 79347281 is 18274397.

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 31460881 + 47886400 = 5609^2 + 6920^2 .

It is a cyclic number.

It is not a de Polignac number, because 79347281 - 2¹⁴ = 79330897 is a prime.

It is a super-2 number, since 2×79347281² = 12591982004185922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79347251) 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, 3051806 + ... + 3051831.

It is an arithmetic number, because the mean of its divisors is an integer number (21362733).

Almost surely, 2^79347281 is an apocalyptic number.

It is an amenable number.

79347281 is a deficient number, since it is larger than the sum of its proper divisors (6103651).

79347281 is a wasteful number, since it uses less digits than its factorization.

79347281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103650.

The product of its digits is 84672, while the sum is 41.

The square root of 79347281 is about 8907.7090769737. The cubic root of 79347281 is about 429.7118693511.

The spelling of 79347281 in words is "seventy-nine million, three hundred forty-seven thousand, two hundred eighty-one".