79583821 has 2 divisors, whose sum is σ = 79583822. Its totient is φ = 79583820.

The previous prime is 79583767. The next prime is 79583839. The reversal of 79583821 is 12838597.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42068196 + 37515625 = 6486^2 + 6125^2 .

It is an emirp because it is prime and its reverse (12838597) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79583821 - 2¹¹ = 79581773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79583321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39791910 + 39791911.

It is an arithmetic number, because the mean of its divisors is an integer number (39791911).

Almost surely, 2^79583821 is an apocalyptic number.

It is an amenable number.

79583821 is a deficient number, since it is larger than the sum of its proper divisors (1).

79583821 is an equidigital number, since it uses as much as digits as its factorization.

79583821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 79583821 is about 8920.9764600071. The cubic root of 79583821 is about 430.1384464960.

The spelling of 79583821 in words is "seventy-nine million, five hundred eighty-three thousand, eight hundred twenty-one".