77071 has 4 divisors (see below), whose sum is σ = 79192. Its totient is φ = 74952.

The previous prime is 77069. The next prime is 77081. The reversal of 77071 is 17077.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77071 - 2¹ = 77069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005 + ... + 1078.

It is an arithmetic number, because the mean of its divisors is an integer number (19798).

2⁷⁷⁰⁷¹ is an apocalyptic number.

77071 is a deficient number, since it is larger than the sum of its proper divisors (2121).

77071 is a wasteful number, since it uses less digits than its factorization.

77071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120.

The product of its (nonzero) digits is 343, while the sum is 22.

The square root of 77071 is about 277.6166421524. The cubic root of 77071 is about 42.5562806853.

It can be divided in two parts, 770 and 71, that added together give a square (841 = 29²).

The spelling of 77071 in words is "seventy-seven thousand, seventy-one", and thus it is an iban number.