79237813 has 2 divisors, whose sum is σ = 79237814. Its totient is φ = 79237812.

The previous prime is 79237811. The next prime is 79237853. The reversal of 79237813 is 31873297.

It is an a-pointer prime, because the next prime (79237853) can be obtained adding 79237813 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68525284 + 10712529 = 8278^2 + 3273^2 .

It is a cyclic number.

It is not a de Polignac number, because 79237813 - 2¹ = 79237811 is a prime.

Together with 79237811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79237811) by changing a digit.

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

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39618906 + 39618907.

It is an arithmetic number, because the mean of its divisors is an integer number (39618907).

Almost surely, 2^79237813 is an apocalyptic number.

It is an amenable number.

79237813 is a deficient number, since it is larger than the sum of its proper divisors (1).

79237813 is an equidigital number, since it uses as much as digits as its factorization.

79237813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 79237813 is about 8901.5623909514. The cubic root of 79237813 is about 429.5141673547.

The spelling of 79237813 in words is "seventy-nine million, two hundred thirty-seven thousand, eight hundred thirteen".