79481081 has 2 divisors, whose sum is σ = 79481082. Its totient is φ = 79481080.

The previous prime is 79481063. The next prime is 79481107. The reversal of 79481081 is 18018497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59598400 + 19882681 = 7720^2 + 4459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79481081 is a prime.

It is a super-2 number, since 2×79481081² = 12634484473857122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (79481581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39740540 + 39740541.

It is an arithmetic number, because the mean of its divisors is an integer number (39740541).

Almost surely, 2^79481081 is an apocalyptic number.

It is an amenable number.

79481081 is a deficient number, since it is larger than the sum of its proper divisors (1).

79481081 is an equidigital number, since it uses as much as digits as its factorization.

79481081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 79481081 is about 8915.2162620993. The cubic root of 79481081 is about 429.9532687633.

The spelling of 79481081 in words is "seventy-nine million, four hundred eighty-one thousand, eighty-one".