77998227 has 8 divisors (see below), whose sum is σ = 110115216. Its totient is φ = 48940032.

The previous prime is 77998223. The next prime is 77998229. The reversal of 77998227 is 72289977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77998227 - 2² = 77998223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 1529377 = 77998227 / (7 + 7 + 9 + 9 + 8 + 2 + 2 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 77998227.

It is not an unprimeable number, because it can be changed into a prime (77998223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764638 + ... + 764739.

It is an arithmetic number, because the mean of its divisors is an integer number (13764402).

Almost surely, 2^77998227 is an apocalyptic number.

77998227 is a deficient number, since it is larger than the sum of its proper divisors (32116989).

77998227 is a wasteful number, since it uses less digits than its factorization.

77998227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529397.

The product of its digits is 889056, while the sum is 51.

The square root of 77998227 is about 8831.6604893984. The cubic root of 77998227 is about 427.2626307846.

The spelling of 77998227 in words is "seventy-seven million, nine hundred ninety-eight thousand, two hundred twenty-seven".