77130827 has 4 divisors (see below), whose sum is σ = 77155416. Its totient is φ = 77106240.

The previous prime is 77130817. The next prime is 77130913. The reversal of 77130827 is 72803177.

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 77130827 - 2¹⁶ = 77065291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77130817) 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, 6758 + ... + 14139.

It is an arithmetic number, because the mean of its divisors is an integer number (19288854).

Almost surely, 2^77130827 is an apocalyptic number.

77130827 is a deficient number, since it is larger than the sum of its proper divisors (24589).

77130827 is a wasteful number, since it uses less digits than its factorization.

77130827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24588.

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

The square root of 77130827 is about 8782.4157838262. The cubic root of 77130827 is about 425.6728939200.

The spelling of 77130827 in words is "seventy-seven million, one hundred thirty thousand, eight hundred twenty-seven".