77894641 has 8 divisors (see below), whose sum is σ = 85334400. Its totient is φ = 70514640.

The previous prime is 77894639. The next prime is 77894647. The reversal of 77894641 is 14649877.

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

It is a cyclic number.

It is not a de Polignac number, because 77894641 - 2¹ = 77894639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77894591 and 77894600.

It is not an unprimeable number, because it can be changed into a prime (77894647) 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 7 ways as a sum of consecutive naturals, for example, 12186 + ... + 17443.

It is an arithmetic number, because the mean of its divisors is an integer number (10666800).

Almost surely, 2^77894641 is an apocalyptic number.

It is an amenable number.

77894641 is a deficient number, since it is larger than the sum of its proper divisors (7439759).

77894641 is a wasteful number, since it uses less digits than its factorization.

77894641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29879.

The product of its digits is 338688, while the sum is 46.

The square root of 77894641 is about 8825.7940719235. The cubic root of 77894641 is about 427.0734041163.

The spelling of 77894641 in words is "seventy-seven million, eight hundred ninety-four thousand, six hundred forty-one".