79873993 has 2 divisors, whose sum is σ = 79873994. Its totient is φ = 79873992.

The previous prime is 79873991. The next prime is 79874051. The reversal of 79873993 is 39937897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79085449 + 788544 = 8893^2 + 888^2 .

It is a cyclic number.

It is not a de Polignac number, because 79873993 - 2¹ = 79873991 is a prime.

Together with 79873991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (79873991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39936996 + 39936997.

It is an arithmetic number, because the mean of its divisors is an integer number (39936997).

Almost surely, 2^79873993 is an apocalyptic number.

It is an amenable number.

79873993 is a deficient number, since it is larger than the sum of its proper divisors (1).

79873993 is an equidigital number, since it uses as much as digits as its factorization.

79873993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2571912, while the sum is 55.

The square root of 79873993 is about 8937.2251286403. The cubic root of 79873993 is about 430.6605909159.

It can be divided in two parts, 7987 and 3993, that multiplied together give a triangular number (31892091 = T₇₉₈₆).

The spelling of 79873993 in words is "seventy-nine million, eight hundred seventy-three thousand, nine hundred ninety-three".