77770241 has 4 divisors (see below), whose sum is σ = 77808900. Its totient is φ = 77731584.

The previous prime is 77770237. The next prime is 77770267. The reversal of 77770241 is 14207777.

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 39639616 + 38130625 = 6296^2 + 6175^2 .

It is a cyclic number.

It is not a de Polignac number, because 77770241 - 2² = 77770237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77770271) 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, 16136 + ... + 20393.

It is an arithmetic number, because the mean of its divisors is an integer number (19452225).

Almost surely, 2^77770241 is an apocalyptic number.

It is an amenable number.

77770241 is a deficient number, since it is larger than the sum of its proper divisors (38659).

77770241 is a wasteful number, since it uses less digits than its factorization.

77770241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38658.

The product of its (nonzero) digits is 19208, while the sum is 35.

The square root of 77770241 is about 8818.7437313939. The cubic root of 77770241 is about 426.8459334448.

The spelling of 77770241 in words is "seventy-seven million, seven hundred seventy thousand, two hundred forty-one".