77948833 has 2 divisors, whose sum is σ = 77948834. Its totient is φ = 77948832.

The previous prime is 77948821. The next prime is 77948851. The reversal of 77948833 is 33884977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41563809 + 36385024 = 6447^2 + 6032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77948833 is a prime.

It is not a weakly prime, because it can be changed into another prime (77948333) 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, 38974416 + 38974417.

It is an arithmetic number, because the mean of its divisors is an integer number (38974417).

Almost surely, 2^77948833 is an apocalyptic number.

It is an amenable number.

77948833 is a deficient number, since it is larger than the sum of its proper divisors (1).

77948833 is an equidigital number, since it uses as much as digits as its factorization.

77948833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 49.

The square root of 77948833 is about 8828.8636301622. The cubic root of 77948833 is about 427.1724207561.

The spelling of 77948833 in words is "seventy-seven million, nine hundred forty-eight thousand, eight hundred thirty-three".