77321297 has 2 divisors, whose sum is σ = 77321298. Its totient is φ = 77321296.

The previous prime is 77321291. The next prime is 77321311. The reversal of 77321297 is 79212377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47389456 + 29931841 = 6884^2 + 5471^2 .

It is an emirp because it is prime and its reverse (79212377) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77321297 - 2²² = 73126993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77321297.

It is not a weakly prime, because it can be changed into another prime (77321291) 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, 38660648 + 38660649.

It is an arithmetic number, because the mean of its divisors is an integer number (38660649).

Almost surely, 2^77321297 is an apocalyptic number.

It is an amenable number.

77321297 is a deficient number, since it is larger than the sum of its proper divisors (1).

77321297 is an equidigital number, since it uses as much as digits as its factorization.

77321297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37044, while the sum is 38.

The square root of 77321297 is about 8793.2529248282. The cubic root of 77321297 is about 426.0229972082.

The spelling of 77321297 in words is "seventy-seven million, three hundred twenty-one thousand, two hundred ninety-seven".