77794897 has 2 divisors, whose sum is σ = 77794898. Its totient is φ = 77794896.

The previous prime is 77794891. The next prime is 77794933. The reversal of 77794897 is 79849777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62980096 + 14814801 = 7936^2 + 3849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77794897 is a prime.

It is not a weakly prime, because it can be changed into another prime (77794891) 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, 38897448 + 38897449.

It is an arithmetic number, because the mean of its divisors is an integer number (38897449).

Almost surely, 2^77794897 is an apocalyptic number.

It is an amenable number.

77794897 is a deficient number, since it is larger than the sum of its proper divisors (1).

77794897 is an equidigital number, since it uses as much as digits as its factorization.

77794897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6223392, while the sum is 58.

The square root of 77794897 is about 8820.1415521521. The cubic root of 77794897 is about 426.8910372498.

The spelling of 77794897 in words is "seventy-seven million, seven hundred ninety-four thousand, eight hundred ninety-seven".