77324197 has 2 divisors, whose sum is σ = 77324198. Its totient is φ = 77324196.

The previous prime is 77324189. The next prime is 77324201. The reversal of 77324197 is 79142377.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57972996 + 19351201 = 7614^2 + 4399^2 .

It is an emirp because it is prime and its reverse (79142377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77324197 - 2³ = 77324189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77324147) 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, 38662098 + 38662099.

It is an arithmetic number, because the mean of its divisors is an integer number (38662099).

Almost surely, 2^77324197 is an apocalyptic number.

It is an amenable number.

77324197 is a deficient number, since it is larger than the sum of its proper divisors (1).

77324197 is an equidigital number, since it uses as much as digits as its factorization.

77324197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 40.

The square root of 77324197 is about 8793.4178224397. The cubic root of 77324197 is about 426.0283232581.

The spelling of 77324197 in words is "seventy-seven million, three hundred twenty-four thousand, one hundred ninety-seven".