77061271 has 6 divisors (see below), whose sum is σ = 89642760. Its totient is φ = 66052476.

The previous prime is 77061253. The next prime is 77061287. The reversal of 77061271 is 17216077.

It is not a de Polignac number, because 77061271 - 2⁹ = 77060759 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 (77061241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 786291 + ... + 786388.

It is an arithmetic number, because the mean of its divisors is an integer number (14940460).

Almost surely, 2^77061271 is an apocalyptic number.

77061271 is a deficient number, since it is larger than the sum of its proper divisors (12581489).

77061271 is a wasteful number, since it uses less digits than its factorization.

77061271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572693 (or 1572686 counting only the distinct ones).

The product of its (nonzero) digits is 4116, while the sum is 31.

The square root of 77061271 is about 8778.4549323899. The cubic root of 77061271 is about 425.5448992320.

The spelling of 77061271 in words is "seventy-seven million, sixty-one thousand, two hundred seventy-one".