77201197 has 2 divisors, whose sum is σ = 77201198. Its totient is φ = 77201196.

The previous prime is 77201177. The next prime is 77201227. The reversal of 77201197 is 79110277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68326756 + 8874441 = 8266^2 + 2979^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77201197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77201177) 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, 38600598 + 38600599.

It is an arithmetic number, because the mean of its divisors is an integer number (38600599).

Almost surely, 2^77201197 is an apocalyptic number.

It is an amenable number.

77201197 is a deficient number, since it is larger than the sum of its proper divisors (1).

77201197 is an equidigital number, since it uses as much as digits as its factorization.

77201197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6174, while the sum is 34.

The square root of 77201197 is about 8786.4211713302. The cubic root of 77201197 is about 425.8023082224.

The spelling of 77201197 in words is "seventy-seven million, two hundred one thousand, one hundred ninety-seven".