77289841 has 4 divisors (see below), whose sum is σ = 77420772. Its totient is φ = 77158912.

The previous prime is 77289827. The next prime is 77289859. The reversal of 77289841 is 14898277.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68409441 + 8880400 = 8271^2 + 2980^2 .

It is a cyclic number.

It is not a de Polignac number, because 77289841 - 2¹⁷ = 77158769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77289791 and 77289800.

It is not an unprimeable number, because it can be changed into a prime (77289811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64576 + ... + 65761.

It is an arithmetic number, because the mean of its divisors is an integer number (19355193).

Almost surely, 2^77289841 is an apocalyptic number.

It is an amenable number.

77289841 is a deficient number, since it is larger than the sum of its proper divisors (130931).

77289841 is a wasteful number, since it uses less digits than its factorization.

77289841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130930.

The product of its digits is 225792, while the sum is 46.

The square root of 77289841 is about 8791.4640987722. The cubic root of 77289841 is about 425.9652175382.

The spelling of 77289841 in words is "seventy-seven million, two hundred eighty-nine thousand, eight hundred forty-one".