77856241 has 4 divisors (see below), whose sum is σ = 78794352. Its totient is φ = 76918132.

The previous prime is 77856239. The next prime is 77856269. The reversal of 77856241 is 14265877.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77856241 - 2¹ = 77856239 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77856194 and 77856203.

It is not an unprimeable number, because it can be changed into a prime (77856041) 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, 468931 + ... + 469096.

It is an arithmetic number, because the mean of its divisors is an integer number (19698588).

Almost surely, 2^77856241 is an apocalyptic number.

It is an amenable number.

77856241 is a deficient number, since it is larger than the sum of its proper divisors (938111).

77856241 is an equidigital number, since it uses as much as digits as its factorization.

77856241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938110.

The product of its digits is 94080, while the sum is 40.

The square root of 77856241 is about 8823.6183621007. The cubic root of 77856241 is about 427.0032139462.

The spelling of 77856241 in words is "seventy-seven million, eight hundred fifty-six thousand, two hundred forty-one".