77000047 has 2 divisors, whose sum is σ = 77000048. Its totient is φ = 77000046.

The previous prime is 77000039. The next prime is 77000069. The reversal of 77000047 is 74000077.

It is a weak prime.

It is an emirp because it is prime and its reverse (74000077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77000047 - 2³ = 77000039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 76999985 and 77000030.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77000087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38500023 + 38500024.

It is an arithmetic number, because the mean of its divisors is an integer number (38500024).

Almost surely, 2^77000047 is an apocalyptic number.

77000047 is a deficient number, since it is larger than the sum of its proper divisors (1).

77000047 is an equidigital number, since it uses as much as digits as its factorization.

77000047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1372, while the sum is 25.

The square root of 77000047 is about 8774.9670654653. The cubic root of 77000047 is about 425.4321730713.

The spelling of 77000047 in words is "seventy-seven million, forty-seven", and thus it is an aban number and an uban number.