77794361 has 2 divisors, whose sum is σ = 77794362. Its totient is φ = 77794360.

The previous prime is 77794357. The next prime is 77794393. The reversal of 77794361 is 16349777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77774761 + 19600 = 8819^2 + 140^2 .

It is a cyclic number.

It is not a de Polignac number, because 77794361 - 2² = 77794357 is a prime.

It is not a weakly prime, because it can be changed into another prime (77794331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38897180 + 38897181.

It is an arithmetic number, because the mean of its divisors is an integer number (38897181).

Almost surely, 2^77794361 is an apocalyptic number.

It is an amenable number.

77794361 is a deficient number, since it is larger than the sum of its proper divisors (1).

77794361 is an equidigital number, since it uses as much as digits as its factorization.

77794361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 222264, while the sum is 44.

The square root of 77794361 is about 8820.1111670999. Note that the first 4 decimals coincide. The cubic root of 77794361 is about 426.8900568336.

The spelling of 77794361 in words is "seventy-seven million, seven hundred ninety-four thousand, three hundred sixty-one".