77882947 has 2 divisors, whose sum is σ = 77882948. Its totient is φ = 77882946.

The previous prime is 77882929. The next prime is 77882969. The reversal of 77882947 is 74928877.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77882947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77882894 and 77882903.

It is not a weakly prime, because it can be changed into another prime (77882927) 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, 38941473 + 38941474.

It is an arithmetic number, because the mean of its divisors is an integer number (38941474).

Almost surely, 2^77882947 is an apocalyptic number.

77882947 is a deficient number, since it is larger than the sum of its proper divisors (1).

77882947 is an equidigital number, since it uses as much as digits as its factorization.

77882947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1580544, while the sum is 52.

The square root of 77882947 is about 8825.1315570931. The cubic root of 77882947 is about 427.0520314593.

The spelling of 77882947 in words is "seventy-seven million, eight hundred eighty-two thousand, nine hundred forty-seven".