77327247 has 4 divisors (see below), whose sum is σ = 103103000. Its totient is φ = 51551496.

The previous prime is 77327231. The next prime is 77327249. The reversal of 77327247 is 74272377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74272377 = 3 ⋅24757459.

It is not a de Polignac number, because 77327247 - 2⁴ = 77327231 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 (77327249) 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 in 3 ways as a sum of consecutive naturals, for example, 12887872 + ... + 12887877.

It is an arithmetic number, because the mean of its divisors is an integer number (25775750).

Almost surely, 2^77327247 is an apocalyptic number.

77327247 is a deficient number, since it is larger than the sum of its proper divisors (25775753).

77327247 is a wasteful number, since it uses less digits than its factorization.

77327247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25775752.

The product of its digits is 115248, while the sum is 39.

The square root of 77327247 is about 8793.5912459018. The cubic root of 77327247 is about 426.0339246496.

The spelling of 77327247 in words is "seventy-seven million, three hundred twenty-seven thousand, two hundred forty-seven".