79493993 has 2 divisors, whose sum is σ = 79493994. Its totient is φ = 79493992.

The previous prime is 79493983. The next prime is 79494053. The reversal of 79493993 is 39939497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74097664 + 5396329 = 8608^2 + 2323^2 .

It is a cyclic number.

It is not a de Polignac number, because 79493993 - 2⁴ = 79493977 is a prime.

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 (79493923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39746996 + 39746997.

It is an arithmetic number, because the mean of its divisors is an integer number (39746997).

Almost surely, 2^79493993 is an apocalyptic number.

It is an amenable number.

79493993 is a deficient number, since it is larger than the sum of its proper divisors (1).

79493993 is an equidigital number, since it uses as much as digits as its factorization.

79493993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1653372, while the sum is 53.

The square root of 79493993 is about 8915.9403878671. The cubic root of 79493993 is about 429.9765500102.

The spelling of 79493993 in words is "seventy-nine million, four hundred ninety-three thousand, nine hundred ninety-three".