77142671 has 4 divisors (see below), whose sum is σ = 77278344. Its totient is φ = 77007000.

The previous prime is 77142647. The next prime is 77142683. The reversal of 77142671 is 17624177.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77142671 is a prime.

It is a super-3 number, since 3×77142671³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77145671) 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 in 3 ways as a sum of consecutive naturals, for example, 66980 + ... + 68121.

It is an arithmetic number, because the mean of its divisors is an integer number (19319586).

Almost surely, 2^77142671 is an apocalyptic number.

77142671 is a deficient number, since it is larger than the sum of its proper divisors (135673).

77142671 is a wasteful number, since it uses less digits than its factorization.

77142671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135672.

The product of its digits is 16464, while the sum is 35.

The square root of 77142671 is about 8783.0900598821. The cubic root of 77142671 is about 425.6946811954.

The spelling of 77142671 in words is "seventy-seven million, one hundred forty-two thousand, six hundred seventy-one".