77930 has 8 divisors (see below), whose sum is σ = 140292.
Its totient is φ = 31168.
The previous prime is 77929. The next prime is 77933. The reversal of 77930 is 3977.
It is a happy number.
It can be written as a sum of positive squares in 2 ways, for example, as 73441 + 4489 = 271^2 + 67^2
It is a sphenic number, since it is the product of 3 distinct primes.
It is a Curzon number.
It is a nialpdrome in base 5.
It is a self number, because there is not a number n which added to its sum of digits gives 77930.
It is not an unprimeable number, because it can be changed into a prime (77933) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3887 + ... + 3906.
277930 is an apocalyptic number.
77930 is a deficient number, since it is larger than the sum of its proper divisors (62362).
77930 is a wasteful number, since it uses less digits than its factorization.
77930 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7800.
The product of its (nonzero) digits is 1323, while the sum is 26.
The square root of 77930 is about 279.1594526431.
The cubic root of 77930 is about 42.7138015340.
The spelling of 77930 in words is "seventy-seven thousand, nine hundred thirty".